2121312502 has 4 divisors (see below), whose sum is σ = 3181968756. Its totient is φ = 1060656250.

The previous prime is 2121312493. The next prime is 2121312569. The reversal of 2121312502 is 2052131212.

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

It is a super-2 number, since 2×2121312502² = 8999933462283000008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121312502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530328124 + ... + 530328127.

It is an arithmetic number, because the mean of its divisors is an integer number (795492189).

Almost surely, 2^2121312502 is an apocalyptic number.

2121312502 is a deficient number, since it is larger than the sum of its proper divisors (1060656254).

2121312502 is a wasteful number, since it uses less digits than its factorization.

2121312502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060656253.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2121312502 is about 46057.7083884989. The cubic root of 2121312502 is about 1284.8967101945.

Adding to 2121312502 its reverse (2052131212), we get a palindrome (4173443714).

The spelling of 2121312502 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, five hundred two".