31212111452445 has 48 divisors (see below), whose sum is σ = 67450588912512. Its totient is φ = 12971267095680.

The previous prime is 31212111452441. The next prime is 31212111452479. The reversal of 31212111452445 is 54425411121213.

31212111452445 is a `hidden beast` number, since 3 + 1 + 2 + 12 + 1 + 114 + 524 + 4 + 5 = 666.

It is not a de Polignac number, because 31212111452445 - 2² = 31212111452441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212111452441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4503908722 + ... + 4503915651.

It is an arithmetic number, because the mean of its divisors is an integer number (1405220602344).

Almost surely, 2^{31212111452445} is an apocalyptic number.

31212111452445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31212111452445 is an abundant number, since it is smaller than the sum of its proper divisors (36238477460067).

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

31212111452445 is a wasteful number, since it uses less digits than its factorization.

31212111452445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007824402 (or 9007824399 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

Adding to 31212111452445 its reverse (54425411121213), we get a palindrome (85637522573658).

The spelling of 31212111452445 in words is "thirty-one trillion, two hundred twelve billion, one hundred eleven million, four hundred fifty-two thousand, four hundred forty-five".