121002002202021 has 16 divisors (see below), whose sum is σ = 173626788120768. Its totient is φ = 74678188435200.

The previous prime is 121002002201999. The next prime is 121002002202023. The reversal of 121002002202021 is 120202200200121.

It is not a de Polignac number, because 121002002202021 - 2²⁶ = 121001935093157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002002202023) 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, 19447441795 + ... + 19447448016.

It is an arithmetic number, because the mean of its divisors is an integer number (10851674257548).

Almost surely, 2^{121002002202021} is an apocalyptic number.

It is an amenable number.

121002002202021 is a deficient number, since it is larger than the sum of its proper divisors (52624785918747).

121002002202021 is a wasteful number, since it uses less digits than its factorization.

121002002202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38894889892.

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

Adding to 121002002202021 its reverse (120202200200121), we get a palindrome (241204202402142).

The spelling of 121002002202021 in words is "one hundred twenty-one trillion, two billion, two million, two hundred two thousand, twenty-one".