222231142981 has 2 divisors, whose sum is σ = 222231142982. Its totient is φ = 222231142980.

The previous prime is 222231142943. The next prime is 222231143059. The reversal of 222231142981 is 189241132222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152873180100 + 69357962881 = 390990^2 + 263359^2 .

It is a cyclic number.

It is not a de Polignac number, because 222231142981 - 2¹⁷ = 222231011909 is a prime.

It is a super-2 number, since 2×222231142981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222231142981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222231142901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111115571490 + 111115571491.

It is an arithmetic number, because the mean of its divisors is an integer number (111115571491).

Almost surely, 2^222231142981 is an apocalyptic number.

It is an amenable number.

222231142981 is a deficient number, since it is larger than the sum of its proper divisors (1).

222231142981 is an equidigital number, since it uses as much as digits as its factorization.

222231142981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The spelling of 222231142981 in words is "two hundred twenty-two billion, two hundred thirty-one million, one hundred forty-two thousand, nine hundred eighty-one".