31212103121102 has 32 divisors (see below), whose sum is σ = 47423080793088. Its totient is φ = 15404738491296.

The previous prime is 31212103121081. The next prime is 31212103121113. The reversal of 31212103121102 is 20112130121213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1422406343 + ... + 1422428285.

It is an arithmetic number, because the mean of its divisors is an integer number (1481971274784).

Almost surely, 2^{31212103121102} is an apocalyptic number.

31212103121102 is a deficient number, since it is larger than the sum of its proper divisors (16210977671986).

31212103121102 is a wasteful number, since it uses less digits than its factorization.

31212103121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29024.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31212103121102 its reverse (20112130121213), we get a palindrome (51324233242315).

The spelling of 31212103121102 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred twenty-one thousand, one hundred two".