101021012021021 has 4 divisors (see below), whose sum is σ = 101405122333152. Its totient is φ = 100636901708892.

The previous prime is 101021012020963. The next prime is 101021012021047. The reversal of 101021012021021 is 120120210120101.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101021012021021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101021012020987 and 101021012021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021012021071) 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, 192055155671 + ... + 192055156196.

It is an arithmetic number, because the mean of its divisors is an integer number (25351280583288).

Almost surely, 2^{101021012021021} is an apocalyptic number.

It is an amenable number.

101021012021021 is a deficient number, since it is larger than the sum of its proper divisors (384110312131).

101021012021021 is an equidigital number, since it uses as much as digits as its factorization.

101021012021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384110312130.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101021012021021 its reverse (120120210120101), we get a palindrome (221141222141122).

The spelling of 101021012021021 in words is "one hundred one trillion, twenty-one billion, twelve million, twenty-one thousand, twenty-one".