101020121020021 has 16 divisors (see below), whose sum is σ = 119176177146880. Its totient is φ = 83795234624640.

The previous prime is 101020121019991. The next prime is 101020121020037. The reversal of 101020121020021 is 120020121020101.

It is not a de Polignac number, because 101020121020021 - 2⁵ = 101020121019989 is a prime.

It is a super-4 number, since 4×101020121020021⁴ (a number of 57 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101020121019983 and 101020121020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020121020921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108210775 + ... + 109140331.

It is an arithmetic number, because the mean of its divisors is an integer number (7448511071680).

Almost surely, 2^{101020121020021} is an apocalyptic number.

It is an amenable number.

101020121020021 is a deficient number, since it is larger than the sum of its proper divisors (18156056126859).

101020121020021 is an equidigital number, since it uses as much as digits as its factorization.

101020121020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430404.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101020121020021 its reverse (120020121020101), we get a palindrome (221040242040122).

The spelling of 101020121020021 in words is "one hundred one trillion, twenty billion, one hundred twenty-one million, twenty thousand, twenty-one".