2120431252161 has 8 divisors (see below), whose sum is σ = 2859008430240. Its totient is φ = 1397737454432.

The previous prime is 2120431252127. The next prime is 2120431252201. The reversal of 2120431252161 is 1612521340212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2120431252161 - 2¹³ = 2120431243969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120431252561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3970844775 + ... + 3970845308.

It is an arithmetic number, because the mean of its divisors is an integer number (357376053780).

Almost surely, 2^{2120431252161} is an apocalyptic number.

It is an amenable number.

2120431252161 is a deficient number, since it is larger than the sum of its proper divisors (738577178079).

2120431252161 is an equidigital number, since it uses as much as digits as its factorization.

2120431252161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7941690175.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 2120431252161 its reverse (1612521340212), we get a palindrome (3732952592373).

The spelling of 2120431252161 in words is "two trillion, one hundred twenty billion, four hundred thirty-one million, two hundred fifty-two thousand, one hundred sixty-one".