22131231377 has 2 divisors, whose sum is σ = 22131231378. Its totient is φ = 22131231376.

The previous prime is 22131231347. The next prime is 22131231433. The reversal of 22131231377 is 77313213122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21423884161 + 707347216 = 146369^2 + 26596^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131231377 - 2⁶ = 22131231313 is a prime.

It is a super-2 number, since 2×22131231377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22131231347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065615688 + 11065615689.

It is an arithmetic number, because the mean of its divisors is an integer number (11065615689).

Almost surely, 2^22131231377 is an apocalyptic number.

It is an amenable number.

22131231377 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131231377 is an equidigital number, since it uses as much as digits as its factorization.

22131231377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

Adding to 22131231377 its reverse (77313213122), we get a palindrome (99444444499).

The spelling of 22131231377 in words is "twenty-two billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred seventy-seven".