101221099975 has 48 divisors (see below), whose sum is σ = 132183539712. Its totient is φ = 76817836160.

The previous prime is 101221099961. The next prime is 101221099999. The reversal of 101221099975 is 579990122101.

It is not a de Polignac number, because 101221099975 - 2⁵ = 101221099943 is a prime.

It is a super-2 number, since 2×101221099975² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5159034 + ... + 5178616.

It is an arithmetic number, because the mean of its divisors is an integer number (2753823744).

Almost surely, 2^101221099975 is an apocalyptic number.

101221099975 is a deficient number, since it is larger than the sum of its proper divisors (30962439737).

101221099975 is a wasteful number, since it uses less digits than its factorization.

101221099975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19776 (or 19771 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 46.

The spelling of 101221099975 in words is "one hundred one billion, two hundred twenty-one million, ninety-nine thousand, nine hundred seventy-five".