2121262656 has 56 divisors (see below), whose sum is σ = 5731946880. Its totient is φ = 692040192.

The previous prime is 2121262643. The next prime is 2121262691. The reversal of 2121262656 is 6562621212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108511 + ... + 126558.

Almost surely, 2^2121262656 is an apocalyptic number.

It is an amenable number.

2121262656 is an abundant number, since it is smaller than the sum of its proper divisors (3610684224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121262656 is a wasteful number, since it uses less digits than its factorization.

2121262656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235131 (or 235121 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 2121262656 is about 46057.1672598305. The cubic root of 2121262656 is about 1284.8866460695.

Adding to 2121262656 its reverse (6562621212), we get a palindrome (8683883868).

The spelling of 2121262656 in words is "two billion, one hundred twenty-one million, two hundred sixty-two thousand, six hundred fifty-six".