121020202200021 has 16 divisors (see below), whose sum is σ = 166840707313728. Its totient is φ = 77976697404800.

The previous prime is 121020202200017. The next prime is 121020202200067. The reversal of 121020202200021 is 120002202020121.

It is a cyclic number.

It is not a de Polignac number, because 121020202200021 - 2² = 121020202200017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020202200221) 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, 4597669470 + ... + 4597695791.

It is an arithmetic number, because the mean of its divisors is an integer number (10427544207108).

Almost surely, 2^{121020202200021} is an apocalyptic number.

It is an amenable number.

121020202200021 is a deficient number, since it is larger than the sum of its proper divisors (45820505113707).

121020202200021 is a wasteful number, since it uses less digits than its factorization.

121020202200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195365412.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121020202200021 its reverse (120002202020121), we get a palindrome (241022404220142).

The spelling of 121020202200021 in words is "one hundred twenty-one trillion, twenty billion, two hundred two million, two hundred thousand, twenty-one".