20132221061 has 2 divisors, whose sum is σ = 20132221062. Its totient is φ = 20132221060.

The previous prime is 20132221033. The next prime is 20132221069. The reversal of 20132221061 is 16012223102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15695328961 + 4436892100 = 125281^2 + 66610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132221061 - 2²² = 20128026757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132221069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066110530 + 10066110531.

It is an arithmetic number, because the mean of its divisors is an integer number (10066110531).

Almost surely, 2^20132221061 is an apocalyptic number.

It is an amenable number.

20132221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132221061 is an equidigital number, since it uses as much as digits as its factorization.

20132221061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20132221061 its reverse (16012223102), we get a palindrome (36144444163).

The spelling of 20132221061 in words is "twenty billion, one hundred thirty-two million, two hundred twenty-one thousand, sixty-one".