123101311021 has 16 divisors (see below), whose sum is σ = 133694426880. Its totient is φ = 112671984960.

The previous prime is 123101311001. The next prime is 123101311027. The reversal of 123101311021 is 120113101321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123101311021 - 2⁹ = 123101310509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123101310986 and 123101311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123101311027) 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, 845895 + ... + 980683.

It is an arithmetic number, because the mean of its divisors is an integer number (8355901680).

Almost surely, 2^123101311021 is an apocalyptic number.

It is an amenable number.

123101311021 is a deficient number, since it is larger than the sum of its proper divisors (10593115859).

123101311021 is a wasteful number, since it uses less digits than its factorization.

123101311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135396.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 123101311021 its reverse (120113101321), we get a palindrome (243214412342).

The spelling of 123101311021 in words is "one hundred twenty-three billion, one hundred one million, three hundred eleven thousand, twenty-one".