101020201210021 has 4 divisors (see below), whose sum is σ = 101156163796512. Its totient is φ = 100884238623532.

The previous prime is 101020201210013. The next prime is 101020201210069. The reversal of 101020201210021 is 120012102020101.

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 not a de Polignac number, because 101020201210021 - 2³ = 101020201210013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101020201209983 and 101020201210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020201210091) 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, 67981292131 + ... + 67981293616.

It is an arithmetic number, because the mean of its divisors is an integer number (25289040949128).

Almost surely, 2^{101020201210021} is an apocalyptic number.

It is an amenable number.

101020201210021 is a deficient number, since it is larger than the sum of its proper divisors (135962586491).

101020201210021 is an equidigital number, since it uses as much as digits as its factorization.

101020201210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135962586490.

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

Adding to 101020201210021 its reverse (120012102020101), we get a palindrome (221032303230122).

The spelling of 101020201210021 in words is "one hundred one trillion, twenty billion, two hundred one million, two hundred ten thousand, twenty-one".