20122204221421 has 2 divisors, whose sum is σ = 20122204221422. Its totient is φ = 20122204221420.

The previous prime is 20122204221391. The next prime is 20122204221451. The reversal of 20122204221421 is 12412240222102.

It is a balanced prime because it is at equal distance from previous prime (20122204221391) and next prime (20122204221451).

It can be written as a sum of positive squares in only one way, i.e., 20065696275625 + 56507945796 = 4479475^2 + 237714^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122204221421 - 2¹⁷ = 20122204090349 is a prime.

It is a super-2 number, since 2×20122204221421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122204221451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061102110710 + 10061102110711.

It is an arithmetic number, because the mean of its divisors is an integer number (10061102110711).

Almost surely, 2^{20122204221421} is an apocalyptic number.

It is an amenable number.

20122204221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122204221421 is an equidigital number, since it uses as much as digits as its factorization.

20122204221421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 20122204221421 its reverse (12412240222102), we get a palindrome (32534444443523).

The spelling of 20122204221421 in words is "twenty trillion, one hundred twenty-two billion, two hundred four million, two hundred twenty-one thousand, four hundred twenty-one".