121122100022021 has 16 divisors (see below), whose sum is σ = 144447842156544. Its totient is φ = 99302260106544.

The previous prime is 121122100021987. The next prime is 121122100022023. The reversal of 121122100022021 is 120220001221121.

It is a cyclic number.

It is not a de Polignac number, because 121122100022021 - 2³⁰ = 121121026280197 is a prime.

It is a super-2 number, since 2×121122100022021² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122100022023) 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, 4960175 + ... + 16335468.

It is an arithmetic number, because the mean of its divisors is an integer number (9027990134784).

Almost surely, 2^{121122100022021} is an apocalyptic number.

It is an amenable number.

121122100022021 is a deficient number, since it is larger than the sum of its proper divisors (23325742134523).

121122100022021 is a wasteful number, since it uses less digits than its factorization.

121122100022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21331000.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121122100022021 its reverse (120220001221121), we get a palindrome (241342101243142).

The spelling of 121122100022021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred million, twenty-two thousand, twenty-one".