20224131121 has 2 divisors, whose sum is σ = 20224131122. Its totient is φ = 20224131120.

The previous prime is 20224131023. The next prime is 20224131149. The reversal of 20224131121 is 12113142202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19293210000 + 930921121 = 138900^2 + 30511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20224131121 - 2¹⁵ = 20224098353 is a prime.

It is not a weakly prime, because it can be changed into another prime (20224134121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112065560 + 10112065561.

It is an arithmetic number, because the mean of its divisors is an integer number (10112065561).

Almost surely, 2^20224131121 is an apocalyptic number.

It is an amenable number.

20224131121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224131121 is an equidigital number, since it uses as much as digits as its factorization.

20224131121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20224131121 its reverse (12113142202), we get a palindrome (32337273323).

The spelling of 20224131121 in words is "twenty billion, two hundred twenty-four million, one hundred thirty-one thousand, one hundred twenty-one".