212051121231345 has 16 divisors (see below), whose sum is σ = 370125593422272. Its totient is φ = 102812664839360.

The previous prime is 212051121231337. The next prime is 212051121231349. The reversal of 212051121231345 is 543132121150212.

It is not a de Polignac number, because 212051121231345 - 2³ = 212051121231337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (212051121231349) 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, 642579155082 + ... + 642579155411.

It is an arithmetic number, because the mean of its divisors is an integer number (23132849588892).

Almost surely, 2^{212051121231345} is an apocalyptic number.

It is an amenable number.

212051121231345 is a deficient number, since it is larger than the sum of its proper divisors (158074472190927).

212051121231345 is a wasteful number, since it uses less digits than its factorization.

212051121231345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285158310512.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 212051121231345 its reverse (543132121150212), we get a palindrome (755183242381557).

The spelling of 212051121231345 in words is "two hundred twelve trillion, fifty-one billion, one hundred twenty-one million, two hundred thirty-one thousand, three hundred forty-five".