101020002020021 has 4 divisors (see below), whose sum is σ = 115451430880032. Its totient is φ = 86588573160012.

The previous prime is 101020002020009. The next prime is 101020002020053. The reversal of 101020002020021 is 120020200020101.

It is a happy number.

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.

It is not a de Polignac number, because 101020002020021 - 2²² = 101019997825717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101020002019984 and 101020002020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020002070021) 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, 7215714429995 + ... + 7215714430008.

It is an arithmetic number, because the mean of its divisors is an integer number (28862857720008).

Almost surely, 2^{101020002020021} is an apocalyptic number.

It is an amenable number.

101020002020021 is a deficient number, since it is larger than the sum of its proper divisors (14431428860011).

101020002020021 is an equidigital number, since it uses as much as digits as its factorization.

101020002020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14431428860010.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 101020002020021 its reverse (120020200020101), we get a palindrome (221040202040122).

The spelling of 101020002020021 in words is "one hundred one trillion, twenty billion, two million, twenty thousand, twenty-one".