220121220937 has 2 divisors, whose sum is σ = 220121220938. Its totient is φ = 220121220936.

The previous prime is 220121220911. The next prime is 220121220953. The reversal of 220121220937 is 739022121022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182325584016 + 37795636921 = 426996^2 + 194411^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121220937 - 2¹⁵ = 220121188169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220121220899 and 220121220908.

It is not a weakly prime, because it can be changed into another prime (220121220637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060610468 + 110060610469.

It is an arithmetic number, because the mean of its divisors is an integer number (110060610469).

Almost surely, 2^220121220937 is an apocalyptic number.

It is an amenable number.

220121220937 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121220937 is an equidigital number, since it uses as much as digits as its factorization.

220121220937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 220121220937 its reverse (739022121022), we get a palindrome (959143341959).

The spelling of 220121220937 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, nine hundred thirty-seven".