221442211231 has 2 divisors, whose sum is σ = 221442211232. Its totient is φ = 221442211230.

The previous prime is 221442211219. The next prime is 221442211337. The reversal of 221442211231 is 132112244122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221442211231 - 2¹⁷ = 221442080159 is a prime.

It is a super-2 number, since 2×221442211231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221442211196 and 221442211205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221442211631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110721105615 + 110721105616.

It is an arithmetic number, because the mean of its divisors is an integer number (110721105616).

Almost surely, 2^221442211231 is an apocalyptic number.

221442211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221442211231 is an equidigital number, since it uses as much as digits as its factorization.

221442211231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

Adding to 221442211231 its reverse (132112244122), we get a palindrome (353554455353).

The spelling of 221442211231 in words is "two hundred twenty-one billion, four hundred forty-two million, two hundred eleven thousand, two hundred thirty-one".