22002120211021 has 4 divisors (see below), whose sum is σ = 22147829616544. Its totient is φ = 21856410805500.

The previous prime is 22002120211003. The next prime is 22002120211031. The reversal of 22002120211021 is 12011202120022.

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 22002120211021 - 2³⁹ = 21452364397133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22002120210986 and 22002120211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002120211031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72854702535 + ... + 72854702836.

It is an arithmetic number, because the mean of its divisors is an integer number (5536957404136).

Almost surely, 2^{22002120211021} is an apocalyptic number.

It is an amenable number.

22002120211021 is a deficient number, since it is larger than the sum of its proper divisors (145709405523).

22002120211021 is a wasteful number, since it uses less digits than its factorization.

22002120211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145709405522.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22002120211021 its reverse (12011202120022), we get a palindrome (34013322331043).

The spelling of 22002120211021 in words is "twenty-two trillion, two billion, one hundred twenty million, two hundred eleven thousand, twenty-one".