31212102122010 has 48 divisors (see below), whose sum is σ = 81192062016000. Its totient is φ = 8319063489120.

The previous prime is 31212102121999. The next prime is 31212102122017. The reversal of 31212102122010 is 1022120121213.

31212102122010 is a `hidden beast` number, since 31 + 212 + 10 + 212 + 201 + 0 = 666.

It is a super-2 number, since 2×31212102122010² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31212102122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86563746 + ... + 86923565.

It is an arithmetic number, because the mean of its divisors is an integer number (1691501292000).

Almost surely, 2^{31212102122010} is an apocalyptic number.

31212102122010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31212102122010 is an abundant number, since it is smaller than the sum of its proper divisors (49979959893990).

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

31212102122010 is a wasteful number, since it uses less digits than its factorization.

31212102122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173489323 (or 173489320 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31212102122010 its reverse (1022120121213), we get a palindrome (32234222243223).

The spelling of 31212102122010 in words is "thirty-one trillion, two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, ten".