22010002120021 has 4 divisors (see below), whose sum is σ = 22010473200672. Its totient is φ = 22009531039372.

The previous prime is 22010002120019. The next prime is 22010002120033. The reversal of 22010002120021 is 12002120001022.

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 22010002120021 - 2¹ = 22010002120019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22010002119983 and 22010002120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010002150021) 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, 235470235 + ... + 235563688.

It is an arithmetic number, because the mean of its divisors is an integer number (5502618300168).

Almost surely, 2^{22010002120021} is an apocalyptic number.

It is an amenable number.

22010002120021 is a deficient number, since it is larger than the sum of its proper divisors (471080651).

22010002120021 is an equidigital number, since it uses as much as digits as its factorization.

22010002120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471080650.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22010002120021 its reverse (12002120001022), we get a palindrome (34012122121043).

The spelling of 22010002120021 in words is "twenty-two trillion, ten billion, two million, one hundred twenty thousand, twenty-one".