100001220999957 has 12 divisors (see below), whose sum is σ = 144882601493344. Its totient is φ = 66466068336360.

The previous prime is 100001220999949. The next prime is 100001220999973. The reversal of 100001220999957 is 759999022100001.

It is not a de Polignac number, because 100001220999957 - 2³ = 100001220999949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001220999947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16784357713 + ... + 16784363670.

Almost surely, 2^{100001220999957} is an apocalyptic number.

It is an amenable number.

100001220999957 is a deficient number, since it is larger than the sum of its proper divisors (44881380493387).

100001220999957 is a wasteful number, since it uses less digits than its factorization.

100001220999957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33568721720 (or 33568721717 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 54.

The spelling of 100001220999957 in words is "one hundred trillion, one billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred fifty-seven".