31212112223130 has 32 divisors (see below), whose sum is σ = 74960695263168. Its totient is φ = 8317493712000.

The previous prime is 31212112223119. The next prime is 31212112223143. The reversal of 31212112223130 is 3132221121213.

It is a super-2 number, since 2×31212112223130² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31212112223130.

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 15 ways as a sum of consecutive naturals, for example, 358469131 + ... + 358556190.

It is an arithmetic number, because the mean of its divisors is an integer number (2342521726974).

Almost surely, 2^{31212112223130} is an apocalyptic number.

31212112223130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31212112223130 is an abundant number, since it is smaller than the sum of its proper divisors (43748583040038).

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

31212112223130 is a wasteful number, since it uses less digits than its factorization.

31212112223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717026782.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31212112223130 its reverse (3132221121213), we get a palindrome (34344333344343).

The spelling of 31212112223130 in words is "thirty-one trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-three thousand, one hundred thirty".