221220222203131 has 16 divisors (see below), whose sum is σ = 241795823770368. Its totient is φ = 201485289139200.

The previous prime is 221220222203117. The next prime is 221220222203143. The reversal of 221220222203131 is 131302222022122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221220222203131 is a prime.

It is a super-2 number, since 2×221220222203131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220222203096 and 221220222203105.

It is not an unprimeable number, because it can be changed into a prime (221220222203191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13137001 + ... + 24799621.

It is an arithmetic number, because the mean of its divisors is an integer number (15112238985648).

Almost surely, 2^{221220222203131} is an apocalyptic number.

221220222203131 is a deficient number, since it is larger than the sum of its proper divisors (20575601567237).

221220222203131 is a wasteful number, since it uses less digits than its factorization.

221220222203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11698662.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221220222203131 its reverse (131302222022122), we get a palindrome (352522444225253).

The spelling of 221220222203131 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred three thousand, one hundred thirty-one".