31321411132220 has 48 divisors (see below), whose sum is σ = 71769700453248. Its totient is φ = 11387192151360.

The previous prime is 31321411132183. The next prime is 31321411132241. The reversal of 31321411132220 is 2223111412313.

It is a self number, because there is not a number n which added to its sum of digits gives 31321411132220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14032934 + ... + 16111053.

It is an arithmetic number, because the mean of its divisors is an integer number (1495202092776).

Almost surely, 2^{31321411132220} is an apocalyptic number.

It is an amenable number.

31321411132220 is an abundant number, since it is smaller than the sum of its proper divisors (40448289321028).

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

31321411132220 is a wasteful number, since it uses less digits than its factorization.

31321411132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30148730 (or 30148728 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31321411132220 its reverse (2223111412313), we get a palindrome (33544522544533).

The spelling of 31321411132220 in words is "thirty-one trillion, three hundred twenty-one billion, four hundred eleven million, one hundred thirty-two thousand, two hundred twenty".