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10101001031 = 11918272821
BaseRepresentation
bin10010110100001000…
…10000101101000111
3222001221211000111022
421122010100231013
5131141324013111
64350151301355
7505212043412
oct113204205507
928057730438
1010101001031
11431382a640
121b5a97a85b
13c4c8c17b4
146bb734b79
153e1bae2db
hex25a110b47

10101001031 has 4 divisors (see below), whose sum is σ = 11019273864. Its totient is φ = 9182728200.

The previous prime is 10101000961. The next prime is 10101001037. The reversal of 10101001031 is 13010010101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13010010101 = 111182728191.

It is a cyclic number.

It is not a de Polignac number, because 10101001031 - 230 = 9027259207 is a prime.

It is a super-2 number, since 2×101010010312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101001037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459136400 + ... + 459136421.

It is an arithmetic number, because the mean of its divisors is an integer number (2754818466).

Almost surely, 210101001031 is an apocalyptic number.

10101001031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10101001031 is a deficient number, since it is larger than the sum of its proper divisors (918272833).

10101001031 is an equidigital number, since it uses as much as digits as its factorization.

10101001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918272832.

The product of its (nonzero) digits is 3, while the sum is 8.

Adding to 10101001031 its reverse (13010010101), we get a palindrome (23111011132).

The spelling of 10101001031 in words is "ten billion, one hundred one million, one thousand, thirty-one".

Divisors: 1 11 918272821 10101001031