22021431077 has 2 divisors, whose sum is σ = 22021431078. Its totient is φ = 22021431076.

The previous prime is 22021431067. The next prime is 22021431127. The reversal of 22021431077 is 77013412022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14417765476 + 7603665601 = 120074^2 + 87199^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021431077 - 2¹⁴ = 22021414693 is a prime.

It is a super-2 number, since 2×22021431077² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021431017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010715538 + 11010715539.

It is an arithmetic number, because the mean of its divisors is an integer number (11010715539).

Almost surely, 2^22021431077 is an apocalyptic number.

It is an amenable number.

22021431077 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021431077 is an equidigital number, since it uses as much as digits as its factorization.

22021431077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 22021431077 its reverse (77013412022), we get a palindrome (99034843099).

The spelling of 22021431077 in words is "twenty-two billion, twenty-one million, four hundred thirty-one thousand, seventy-seven".