22102021222021 has 16 divisors (see below), whose sum is σ = 25202571711408. Its totient is φ = 19201552588800.

The previous prime is 22102021221971. The next prime is 22102021222037. The reversal of 22102021222021 is 12022212020122.

It can be written as a sum of positive squares in 8 ways, for example, as 832676325121 + 21269344896900 = 912511^2 + 4611870^2 .

It is a cyclic number.

It is not a de Polignac number, because 22102021222021 - 2⁴³ = 13305928199813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22102021222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102021225021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22674861 + ... + 23629501.

It is an arithmetic number, because the mean of its divisors is an integer number (1575160731963).

Almost surely, 2^{22102021222021} is an apocalyptic number.

It is an amenable number.

22102021222021 is a deficient number, since it is larger than the sum of its proper divisors (3100550489387).

22102021222021 is a wasteful number, since it uses less digits than its factorization.

22102021222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059432.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22102021222021 its reverse (12022212020122), we get a palindrome (34124233242143).

The spelling of 22102021222021 in words is "twenty-two trillion, one hundred two billion, twenty-one million, two hundred twenty-two thousand, twenty-one".