220031224121 has 2 divisors, whose sum is σ = 220031224122. Its totient is φ = 220031224120.

The previous prime is 220031224109. The next prime is 220031224177. The reversal of 220031224121 is 121422130022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134029210000 + 86002014121 = 366100^2 + 293261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220031224121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220031224093 and 220031224102.

It is not a weakly prime, because it can be changed into another prime (220031224181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110015612060 + 110015612061.

It is an arithmetic number, because the mean of its divisors is an integer number (110015612061).

Almost surely, 2^220031224121 is an apocalyptic number.

It is an amenable number.

220031224121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220031224121 is an equidigital number, since it uses as much as digits as its factorization.

220031224121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 220031224121 its reverse (121422130022), we get a palindrome (341453354143).

The spelling of 220031224121 in words is "two hundred twenty billion, thirty-one million, two hundred twenty-four thousand, one hundred twenty-one".