2121312310 has 32 divisors (see below), whose sum is σ = 4290874560. Its totient is φ = 749198208.

The previous prime is 2121312307. The next prime is 2121312311. The reversal of 2121312310 is 132131212.

It is a super-2 number, since 2×2121312310² = 8999931833115072200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121312311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351745 + ... + 357724.

It is an arithmetic number, because the mean of its divisors is an integer number (134089830).

Almost surely, 2^2121312310 is an apocalyptic number.

2121312310 is an abundant number, since it is smaller than the sum of its proper divisors (2169562250).

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

2121312310 is a wasteful number, since it uses less digits than its factorization.

2121312310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709512.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2121312310 is about 46057.7063041572. The cubic root of 2121312310 is about 1284.8966714292.

Adding to 2121312310 its reverse (132131212), we get a palindrome (2253443522).

The spelling of 2121312310 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, three hundred ten".