210220002122021 has 4 divisors (see below), whose sum is σ = 210315426546432. Its totient is φ = 210124577697612.

The previous prime is 210220002121859. The next prime is 210220002122077. The reversal of 210220002122021 is 120221200022012.

It is a happy number.

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 210220002122021 - 2²⁶ = 210219935013157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220005122021) 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, 47712208901 + ... + 47712213306.

It is an arithmetic number, because the mean of its divisors is an integer number (52578856636608).

Almost surely, 2^{210220002122021} is an apocalyptic number.

It is an amenable number.

210220002122021 is a deficient number, since it is larger than the sum of its proper divisors (95424424411).

210220002122021 is an equidigital number, since it uses as much as digits as its factorization.

210220002122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95424424410.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210220002122021 its reverse (120221200022012), we get a palindrome (330441202144033).

The spelling of 210220002122021 in words is "two hundred ten trillion, two hundred twenty billion, two million, one hundred twenty-two thousand, twenty-one".