20121023011 has 8 divisors (see below), whose sum is σ = 20158961760. Its totient is φ = 20083119168.

The previous prime is 20121022993. The next prime is 20121023077. The reversal of 20121023011 is 11032012102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121023011 - 2¹⁵ = 20120990243 is a prime.

It is a super-2 number, since 2×20121023011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121022982 and 20121023000.

It is not an unprimeable number, because it can be changed into a prime (20121093011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332375 + ... + 1347391.

It is an arithmetic number, because the mean of its divisors is an integer number (2519870220).

Almost surely, 2^20121023011 is an apocalyptic number.

20121023011 is a deficient number, since it is larger than the sum of its proper divisors (37938749).

20121023011 is a wasteful number, since it uses less digits than its factorization.

20121023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17453.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20121023011 its reverse (11032012102), we get a palindrome (31153035113).

The spelling of 20121023011 in words is "twenty billion, one hundred twenty-one million, twenty-three thousand, eleven".