221023312031376 has 60 divisors (see below), whose sum is σ = 624032264140428. Its totient is φ = 73022451167232.

The previous prime is 221023312031287. The next prime is 221023312031377. The reversal of 221023312031376 is 673130213320122.

221023312031376 is a `hidden beast` number, since 2 + 2 + 1 + 0 + 2 + 331 + 2 + 0 + 313 + 7 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5867924864400 + 215155387166976 = 2422380^2 + 14668176^2 .

It is a super-2 number, since 2×221023312031376² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 221023312031376.

It is not an unprimeable number, because it can be changed into a prime (221023312031377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6791506345 + ... + 6791538888.

Almost surely, 2^{221023312031376} is an apocalyptic number.

It is an amenable number.

221023312031376 is an abundant number, since it is smaller than the sum of its proper divisors (403008952109052).

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

221023312031376 is a wasteful number, since it uses less digits than its factorization.

221023312031376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13583045360 (or 13583045351 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

Adding to 221023312031376 its reverse (673130213320122), we get a palindrome (894153525351498).

The spelling of 221023312031376 in words is "two hundred twenty-one trillion, twenty-three billion, three hundred twelve million, thirty-one thousand, three hundred seventy-six".