22121021201 has 2 divisors, whose sum is σ = 22121021202. Its totient is φ = 22121021200.

The previous prime is 22121021189. The next prime is 22121021249. The reversal of 22121021201 is 10212012122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14125084801 + 7995936400 = 118849^2 + 89420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121021201 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060510600 + 11060510601.

It is an arithmetic number, because the mean of its divisors is an integer number (11060510601).

Almost surely, 2^22121021201 is an apocalyptic number.

It is an amenable number.

22121021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121021201 is an equidigital number, since it uses as much as digits as its factorization.

22121021201 is an evil number, because the sum of its binary digits is even.

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

Adding to 22121021201 its reverse (10212012122), we get a palindrome (32333033323).

The spelling of 22121021201 in words is "twenty-two billion, one hundred twenty-one million, twenty-one thousand, two hundred one".