123010011021 has 4 divisors (see below), whose sum is σ = 164013348032. Its totient is φ = 82006674012.

The previous prime is 123010010989. The next prime is 123010011053. The reversal of 123010011021 is 120110010321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (123010010989) and next prime (123010011053).

It is not a de Polignac number, because 123010011021 - 2⁵ = 123010010989 is a prime.

It is a super-2 number, since 2×123010011021² (a number of 23 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 = 123010010988 and 123010011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123010011821) 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, 20501668501 + ... + 20501668506.

It is an arithmetic number, because the mean of its divisors is an integer number (41003337008).

Almost surely, 2^123010011021 is an apocalyptic number.

It is an amenable number.

123010011021 is a deficient number, since it is larger than the sum of its proper divisors (41003337011).

123010011021 is an equidigital number, since it uses as much as digits as its factorization.

123010011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41003337010.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 123010011021 its reverse (120110010321), we get a palindrome (243120021342).

The spelling of 123010011021 in words is "one hundred twenty-three billion, ten million, eleven thousand, twenty-one".