101200120011021 has 24 divisors (see below), whose sum is σ = 138154602524160. Its totient is φ = 65892913442496.

The previous prime is 101200120010999. The next prime is 101200120011041. The reversal of 101200120011021 is 120110021002101.

It is not a de Polignac number, because 101200120011021 - 2²² = 101200115816717 is a prime.

It is a super-2 number, since 2×101200120011021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101200120010988 and 101200120011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101200120011041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75658185 + ... + 76984161.

It is an arithmetic number, because the mean of its divisors is an integer number (5756441771840).

Almost surely, 2^{101200120011021} is an apocalyptic number.

It is an amenable number.

101200120011021 is a deficient number, since it is larger than the sum of its proper divisors (36954482513139).

101200120011021 is a wasteful number, since it uses less digits than its factorization.

101200120011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339825 (or 1339782 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101200120011021 its reverse (120110021002101), we get a palindrome (221310141013122).

The spelling of 101200120011021 in words is "one hundred one trillion, two hundred billion, one hundred twenty million, eleven thousand, twenty-one".