2121439656210 has 64 divisors (see below), whose sum is σ = 5818921749504. Its totient is φ = 484890840000.

The previous prime is 2121439656157. The next prime is 2121439656223. The reversal of 2121439656210 is 126569341212.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20454985 + ... + 20558435.

It is an arithmetic number, because the mean of its divisors is an integer number (90920652336).

Almost surely, 2^{2121439656210} is an apocalyptic number.

2121439656210 is an abundant number, since it is smaller than the sum of its proper divisors (3697482093294).

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

2121439656210 is a wasteful number, since it uses less digits than its factorization.

2121439656210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201119.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 2121439656210 in words is "two trillion, one hundred twenty-one billion, four hundred thirty-nine million, six hundred fifty-six thousand, two hundred ten".