221222101031 has 2 divisors, whose sum is σ = 221222101032. Its totient is φ = 221222101030.

The previous prime is 221222100977. The next prime is 221222101151. The reversal of 221222101031 is 130101222122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222101031 is a prime.

It is a super-2 number, since 2×221222101031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222100031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611050515 + 110611050516.

It is an arithmetic number, because the mean of its divisors is an integer number (110611050516).

Almost surely, 2^221222101031 is an apocalyptic number.

221222101031 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222101031 is an equidigital number, since it uses as much as digits as its factorization.

221222101031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221222101031 its reverse (130101222122), we get a palindrome (351323323153).

The spelling of 221222101031 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, thirty-one".