100764221731 has 2 divisors, whose sum is σ = 100764221732. Its totient is φ = 100764221730.

The previous prime is 100764221689. The next prime is 100764221759. The reversal of 100764221731 is 137122467001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100764221731 - 2¹⁷ = 100764090659 is a prime.

It is a super-2 number, since 2×100764221731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100764221791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50382110865 + 50382110866.

It is an arithmetic number, because the mean of its divisors is an integer number (50382110866).

Almost surely, 2^100764221731 is an apocalyptic number.

100764221731 is a deficient number, since it is larger than the sum of its proper divisors (1).

100764221731 is an equidigital number, since it uses as much as digits as its factorization.

100764221731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

Adding to 100764221731 its reverse (137122467001), we get a palindrome (237886688732).

The spelling of 100764221731 in words is "one hundred billion, seven hundred sixty-four million, two hundred twenty-one thousand, seven hundred thirty-one".