101210002001021 has 4 divisors (see below), whose sum is σ = 101210025953052. Its totient is φ = 101209978048992.

The previous prime is 101210002000979. The next prime is 101210002001057. The reversal of 101210002001021 is 120100200012101.

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 42945557397796 + 58264444603225 = 6553286^2 + 7633115^2 .

It is a cyclic number.

It is not a de Polignac number, because 101210002001021 - 2³⁴ = 101192822131837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101210002000993 and 101210002001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210002001321) 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, 3757946 + ... + 14715371.

It is an arithmetic number, because the mean of its divisors is an integer number (25302506488263).

Almost surely, 2^{101210002001021} is an apocalyptic number.

It is an amenable number.

101210002001021 is a deficient number, since it is larger than the sum of its proper divisors (23952031).

101210002001021 is an equidigital number, since it uses as much as digits as its factorization.

101210002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23952030.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101210002001021 its reverse (120100200012101), we get a palindrome (221310202013122).

The spelling of 101210002001021 in words is "one hundred one trillion, two hundred ten billion, two million, one thousand, twenty-one".