2102121030312 has 32 divisors (see below), whose sum is σ = 5839225084800. Its totient is φ = 700707010032.

The previous prime is 2102121030307. The next prime is 2102121030323. The reversal of 2102121030312 is 2130301212012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4866020688 + ... + 4866021119.

It is an arithmetic number, because the mean of its divisors is an integer number (182475783900).

Almost surely, 2^{2102121030312} is an apocalyptic number.

It is an amenable number.

2102121030312 is an abundant number, since it is smaller than the sum of its proper divisors (3737104054488).

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

2102121030312 is a wasteful number, since it uses less digits than its factorization.

2102121030312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9732041822 (or 9732041812 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2102121030312 its reverse (2130301212012), we get a palindrome (4232422242324).

The spelling of 2102121030312 in words is "two trillion, one hundred two billion, one hundred twenty-one million, thirty thousand, three hundred twelve".