2132621120261 has 4 divisors (see below), whose sum is σ = 2132654928000. Its totient is φ = 2132587312524.

The previous prime is 2132621120239. The next prime is 2132621120303. The reversal of 2132621120261 is 1620211262312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2132621120261 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 (2132621320261) 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, 16809071 + ... + 16935468.

It is an arithmetic number, because the mean of its divisors is an integer number (533163732000).

Almost surely, 2^{2132621120261} is an apocalyptic number.

It is an amenable number.

2132621120261 is a deficient number, since it is larger than the sum of its proper divisors (33807739).

2132621120261 is an equidigital number, since it uses as much as digits as its factorization.

2132621120261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33807738.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 2132621120261 its reverse (1620211262312), we get a palindrome (3752832382573).

The spelling of 2132621120261 in words is "two trillion, one hundred thirty-two billion, six hundred twenty-one million, one hundred twenty thousand, two hundred sixty-one".