31212101222132 has 6 divisors (see below), whose sum is σ = 54621177138738. Its totient is φ = 15606050611064.

The previous prime is 31212101222119. The next prime is 31212101222161. The reversal of 31212101222132 is 23122210121213.

It can be written as a sum of positive squares in only one way, i.e., 23325866858596 + 7886234363536 = 4829686^2 + 2808244^2 .

It is a super-2 number, since 2×31212101222132² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31212101222098 and 31212101222107.

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 as a sum of consecutive naturals, namely, 3901512652763 + ... + 3901512652770.

It is an arithmetic number, because the mean of its divisors is an integer number (9103529523123).

Almost surely, 2^{31212101222132} is an apocalyptic number.

It is an amenable number.

31212101222132 is a deficient number, since it is larger than the sum of its proper divisors (23409075916606).

31212101222132 is a wasteful number, since it uses less digits than its factorization.

31212101222132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803025305537 (or 7803025305535 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 31212101222132 its reverse (23122210121213), we get a palindrome (54334311343345).

The spelling of 31212101222132 in words is "thirty-one trillion, two hundred twelve billion, one hundred one million, two hundred twenty-two thousand, one hundred thirty-two".