121033123021 has 16 divisors (see below), whose sum is σ = 125468628480. Its totient is φ = 116631728640.

The previous prime is 121033122979. The next prime is 121033123027. The reversal of 121033123021 is 120321330121.

It is a cyclic number.

It is not a de Polignac number, because 121033123021 - 2¹⁵ = 121033090253 is a prime.

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 121033123021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121033123027) 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, 8632665 + ... + 8646673.

It is an arithmetic number, because the mean of its divisors is an integer number (7841789280).

Almost surely, 2^121033123021 is an apocalyptic number.

It is an amenable number.

121033123021 is a deficient number, since it is larger than the sum of its proper divisors (4435505459).

121033123021 is a wasteful number, since it uses less digits than its factorization.

121033123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15204.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121033123021 its reverse (120321330121), we get a palindrome (241354453142).

The spelling of 121033123021 in words is "one hundred twenty-one billion, thirty-three million, one hundred twenty-three thousand, twenty-one".