210001120022021 has 4 divisors (see below), whose sum is σ = 210672050118252. Its totient is φ = 209330189925792.

The previous prime is 210001120022003. The next prime is 210001120022059. The reversal of 210001120022021 is 120220021100012.

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 20925007276996 + 189076112745025 = 4574386^2 + 13750495^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001120022021 - 2¹⁰ = 210001120020997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210001120021987 and 210001120022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001120022621) 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, 335465047646 + ... + 335465048271.

It is an arithmetic number, because the mean of its divisors is an integer number (52668012529563).

Almost surely, 2^{210001120022021} is an apocalyptic number.

It is an amenable number.

210001120022021 is a deficient number, since it is larger than the sum of its proper divisors (670930096231).

210001120022021 is an equidigital number, since it uses as much as digits as its factorization.

210001120022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670930096230.

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

Adding to 210001120022021 its reverse (120220021100012), we get a palindrome (330221141122033).

The spelling of 210001120022021 in words is "two hundred ten trillion, one billion, one hundred twenty million, twenty-two thousand, twenty-one".