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12001011011 = 119722694957
BaseRepresentation
bin10110010110101000…
…01110010101000011
31010222101000112012022
423023110032111003
5144034224323021
65302503152055
7603252624203
oct131324162503
933871015168
1012001011011
1150a9292220
1223ab14562b
131193429a62
1481bc02403
154a38c01ab
hex2cb50e543

12001011011 has 16 divisors (see below), whose sum is σ = 13235480160. Its totient is φ = 10790599680.

The previous prime is 12001010969. The next prime is 12001011017. The reversal of 12001011011 is 11011010021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12001011011 - 222 = 11996816707 is a prime.

It is a super-2 number, since 2×120010110112 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001011011.

It is not an unprimeable number, because it can be changed into a prime (12001011017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2418545 + ... + 2423501.

It is an arithmetic number, because the mean of its divisors is an integer number (827217510).

Almost surely, 212001011011 is an apocalyptic number.

12001011011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12001011011 is a deficient number, since it is larger than the sum of its proper divisors (1234469149).

12001011011 is a wasteful number, since it uses less digits than its factorization.

12001011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 12001011011 its reverse (11011010021), we get a palindrome (23012021032).

The spelling of 12001011011 in words is "twelve billion, one million, eleven thousand, eleven".

Divisors: 1 11 97 1067 2269 4957 24959 54527 220093 480829 2421023 5289119 11247433 123721763 1091001001 12001011011