2121640236410 has 32 divisors (see below), whose sum is σ = 3987014451840. Its totient is φ = 811346396608.

The previous prime is 2121640236409. The next prime is 2121640236431. The reversal of 2121640236410 is 146320461212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1883900 + ... + 2791479.

It is an arithmetic number, because the mean of its divisors is an integer number (124594201620).

Almost surely, 2^{2121640236410} is an apocalyptic number.

2121640236410 is a deficient number, since it is larger than the sum of its proper divisors (1865374215430).

2121640236410 is a wasteful number, since it uses less digits than its factorization.

2121640236410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677382.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 2121640236410 its reverse (146320461212), we get a palindrome (2267960697622).

The spelling of 2121640236410 in words is "two trillion, one hundred twenty-one billion, six hundred forty million, two hundred thirty-six thousand, four hundred ten".