222011431021 has 4 divisors (see below), whose sum is σ = 233696243200. Its totient is φ = 210326618844.

The previous prime is 222011431007. The next prime is 222011431051. The reversal of 222011431021 is 120134110222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222011431021 - 2¹⁷ = 222011299949 is a prime.

It is a super-2 number, since 2×222011431021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11684812159 = 222011431021 / (2 + 2 + 2 + 0 + 1 + 1 + 4 + 3 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222011431021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222011431051) 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, 5842406061 + ... + 5842406098.

It is an arithmetic number, because the mean of its divisors is an integer number (58424060800).

Almost surely, 2^222011431021 is an apocalyptic number.

It is an amenable number.

222011431021 is a deficient number, since it is larger than the sum of its proper divisors (11684812179).

222011431021 is a wasteful number, since it uses less digits than its factorization.

222011431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684812178.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222011431021 its reverse (120134110222), we get a palindrome (342145541243).

The spelling of 222011431021 in words is "two hundred twenty-two billion, eleven million, four hundred thirty-one thousand, twenty-one".