2121023232001 has 4 divisors (see below), whose sum is σ = 2121191406292. Its totient is φ = 2120855057712.

The previous prime is 2121023231983. The next prime is 2121023232019. The reversal of 2121023232001 is 1002323201212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2121023231983) and next prime (2121023232019).

It can be written as a sum of positive squares in 2 ways, for example, as 1722958138225 + 398065093776 = 1312615^2 + 630924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121023232001 - 2⁵ = 2121023231969 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 2121023232001.

It is not an unprimeable number, because it can be changed into a prime (2121023232301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84068226 + ... + 84093451.

It is an arithmetic number, because the mean of its divisors is an integer number (530297851573).

Almost surely, 2^{2121023232001} is an apocalyptic number.

It is an amenable number.

2121023232001 is a deficient number, since it is larger than the sum of its proper divisors (168174291).

2121023232001 is a wasteful number, since it uses less digits than its factorization.

2121023232001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168174290.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2121023232001 its reverse (1002323201212), we get a palindrome (3123346433213).

The spelling of 2121023232001 in words is "two trillion, one hundred twenty-one billion, twenty-three million, two hundred thirty-two thousand, one".