210021002201021 has 4 divisors (see below), whose sum is σ = 229113820582944. Its totient is φ = 190928183819100.

The previous prime is 210021002200967. The next prime is 210021002201027. The reversal of 210021002201021 is 120102200120012.

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 210021002201021 - 2⁶ = 210021002200957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021002200987 and 210021002201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021002201027) 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, 9546409190945 + ... + 9546409190966.

It is an arithmetic number, because the mean of its divisors is an integer number (57278455145736).

Almost surely, 2^{210021002201021} is an apocalyptic number.

It is an amenable number.

210021002201021 is a deficient number, since it is larger than the sum of its proper divisors (19092818381923).

210021002201021 is a wasteful number, since it uses less digits than its factorization.

210021002201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19092818381922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210021002201021 its reverse (120102200120012), we get a palindrome (330123202321033).

The spelling of 210021002201021 in words is "two hundred ten trillion, twenty-one billion, two million, two hundred one thousand, twenty-one".