31020221312102 has 16 divisors (see below), whose sum is σ = 51000932591424. Its totient is φ = 14033275473000.

The previous prime is 31020221312081. The next prime is 31020221312153. The reversal of 31020221312102 is 20121312202013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3341251424 + ... + 3341260707.

It is an arithmetic number, because the mean of its divisors is an integer number (3187558286964).

Almost surely, 2^{31020221312102} is an apocalyptic number.

31020221312102 is a deficient number, since it is larger than the sum of its proper divisors (19980711279322).

31020221312102 is a wasteful number, since it uses less digits than its factorization.

31020221312102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682512355.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31020221312102 its reverse (20121312202013), we get a palindrome (51141533514115).

It can be divided in two parts, 31020 and 221312102, that added together give a palindrome (221343122).

The spelling of 31020221312102 in words is "thirty-one trillion, twenty billion, two hundred twenty-one million, three hundred twelve thousand, one hundred two".