10100120210021 has 4 divisors (see below), whose sum is σ = 10119432103872. Its totient is φ = 10080808316172.

The previous prime is 10100120209981. The next prime is 10100120210069. The reversal of 10100120210021 is 12001202100101.

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-10100120210021 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 = 10100120209984 and 10100120210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100120215021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9655946141 + ... + 9655947186.

It is an arithmetic number, because the mean of its divisors is an integer number (2529858025968).

Almost surely, 2^{10100120210021} is an apocalyptic number.

It is an amenable number.

10100120210021 is a deficient number, since it is larger than the sum of its proper divisors (19311893851).

10100120210021 is an equidigital number, since it uses as much as digits as its factorization.

10100120210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19311893850.

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

Adding to 10100120210021 its reverse (12001202100101), we get a palindrome (22101322310122).

The spelling of 10100120210021 in words is "ten trillion, one hundred billion, one hundred twenty million, two hundred ten thousand, twenty-one".