232121010002021 has 24 divisors (see below), whose sum is σ = 270618126603480. Its totient is φ = 198518930168832.

The previous prime is 232121010001987. The next prime is 232121010002053. The reversal of 232121010002021 is 120200010121232.

It can be written as a sum of positive squares in 4 ways, for example, as 101885303130625 + 130235706871396 = 10093825^2 + 11412086^2 .

It is a de Polignac number, because none of the positive numbers 2^k-232121010002021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232121010002081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 749316461 + ... + 749626173.

It is an arithmetic number, because the mean of its divisors is an integer number (11275755275145).

Almost surely, 2^{232121010002021} is an apocalyptic number.

It is an amenable number.

232121010002021 is a deficient number, since it is larger than the sum of its proper divisors (38497116601459).

232121010002021 is a wasteful number, since it uses less digits than its factorization.

232121010002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343653 (or 343646 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 232121010002021 its reverse (120200010121232), we get a palindrome (352321020123253).

The spelling of 232121010002021 in words is "two hundred thirty-two trillion, one hundred twenty-one billion, ten million, two thousand, twenty-one".