212121310312102 has 64 divisors (see below), whose sum is σ = 340271946786816. Its totient is φ = 98827409640960.

The previous prime is 212121310312091. The next prime is 212121310312111. The reversal of 212121310312102 is 201213013121212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12531527563 + ... + 12531544489.

It is an arithmetic number, because the mean of its divisors is an integer number (5316749168544).

Almost surely, 2^{212121310312102} is an apocalyptic number.

212121310312102 is a deficient number, since it is larger than the sum of its proper divisors (128150636474714).

212121310312102 is a wasteful number, since it uses less digits than its factorization.

212121310312102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26221.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 212121310312102 its reverse (201213013121212), we get a palindrome (413334323433314).

The spelling of 212121310312102 in words is "two hundred twelve trillion, one hundred twenty-one billion, three hundred ten million, three hundred twelve thousand, one hundred two".