31220201302132 has 12 divisors (see below), whose sum is σ = 54635610761956. Its totient is φ = 15610026798720.

The previous prime is 31220201302093. The next prime is 31220201302133. The reversal of 31220201302132 is 23120310202213.

It can be written as a sum of positive squares in 2 ways, for example, as 14928919529616 + 16291281772516 = 3863796^2 + 4036246^2 .

It is a super-3 number, since 3×31220201302132³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220201302133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17506419 + ... + 19207162.

Almost surely, 2^{31220201302132} is an apocalyptic number.

It is an amenable number.

31220201302132 is a deficient number, since it is larger than the sum of its proper divisors (23415409459824).

31220201302132 is a wasteful number, since it uses less digits than its factorization.

31220201302132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36926178 (or 36926176 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31220201302132 its reverse (23120310202213), we get a palindrome (54340511504345).

The spelling of 31220201302132 in words is "thirty-one trillion, two hundred twenty billion, two hundred one million, three hundred two thousand, one hundred thirty-two".