101100001021 has 4 divisors (see below), whose sum is σ = 101102882272. Its totient is φ = 101097119772.

The previous prime is 101100000961. The next prime is 101100001027. The reversal of 101100001021 is 120100001101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120100001101 = 59 ⋅2035593239.

It is a cyclic number.

It is not a de Polignac number, because 101100001021 - 2⁷ = 101100000893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101100000995 and 101100001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101100001027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387335 + ... + 1458388.

It is an arithmetic number, because the mean of its divisors is an integer number (25275720568).

Almost surely, 2^101100001021 is an apocalyptic number.

It is an amenable number.

101100001021 is a deficient number, since it is larger than the sum of its proper divisors (2881251).

101100001021 is an equidigital number, since it uses as much as digits as its factorization.

101100001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881250.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 101100001021 its reverse (120100001101), we get a palindrome (221200002122).

The spelling of 101100001021 in words is "one hundred one billion, one hundred million, one thousand, twenty-one".