22020212011921 has 2 divisors, whose sum is σ = 22020212011922. Its totient is φ = 22020212011920.

The previous prime is 22020212011913. The next prime is 22020212011927. The reversal of 22020212011921 is 12911021202022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11302445571921 + 10717766440000 = 3361911^2 + 3273800^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020212011921 - 2³ = 22020212011913 is a prime.

It is a super-2 number, since 2×22020212011921² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22020212011927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010106005960 + 11010106005961.

It is an arithmetic number, because the mean of its divisors is an integer number (11010106005961).

Almost surely, 2^{22020212011921} is an apocalyptic number.

It is an amenable number.

22020212011921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020212011921 is an equidigital number, since it uses as much as digits as its factorization.

22020212011921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 22020212011921 its reverse (12911021202022), we get a palindrome (34931233213943).

The spelling of 22020212011921 in words is "twenty-two trillion, twenty billion, two hundred twelve million, eleven thousand, nine hundred twenty-one".