101001020011021 has 4 divisors (see below), whose sum is σ = 108770329242652. Its totient is φ = 93231710779392.

The previous prime is 101001020010991. The next prime is 101001020011037. The reversal of 101001020011021 is 120110020100101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11049547735396 + 89951472275625 = 3324086^2 + 9484275^2 .

It is a cyclic number.

It is not a de Polignac number, because 101001020011021 - 2²¹ = 101001017913869 is a prime.

It is a super-2 number, since 2×101001020011021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101001020010989 and 101001020011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001020011061) 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, 3884654615796 + ... + 3884654615821.

It is an arithmetic number, because the mean of its divisors is an integer number (27192582310663).

Almost surely, 2^{101001020011021} is an apocalyptic number.

It is an amenable number.

101001020011021 is a deficient number, since it is larger than the sum of its proper divisors (7769309231631).

101001020011021 is an equidigital number, since it uses as much as digits as its factorization.

101001020011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7769309231630.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101001020011021 its reverse (120110020100101), we get a palindrome (221111040111122).

The spelling of 101001020011021 in words is "one hundred one trillion, one billion, twenty million, eleven thousand, twenty-one".