100921090979 has 2 divisors, whose sum is σ = 100921090980. Its totient is φ = 100921090978.

The previous prime is 100921090967. The next prime is 100921091003. The reversal of 100921090979 is 979090129001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100921090979 is a prime.

It is a super-3 number, since 3×100921090979³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (100921090579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50460545489 + 50460545490.

It is an arithmetic number, because the mean of its divisors is an integer number (50460545490).

Almost surely, 2^100921090979 is an apocalyptic number.

100921090979 is a deficient number, since it is larger than the sum of its proper divisors (1).

100921090979 is an equidigital number, since it uses as much as digits as its factorization.

100921090979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 47.

The spelling of 100921090979 in words is "one hundred billion, nine hundred twenty-one million, ninety thousand, nine hundred seventy-nine".