220021211220137 has 2 divisors, whose sum is σ = 220021211220138. Its totient is φ = 220021211220136.

The previous prime is 220021211220077. The next prime is 220021211220169. The reversal of 220021211220137 is 731022112120022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210849102174736 + 9172109045401 = 14520644^2 + 3028549^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021211220137 - 2¹² = 220021211216041 is a prime.

It is a super-2 number, since 2×220021211220137² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220021211210137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010605610068 + 110010605610069.

It is an arithmetic number, because the mean of its divisors is an integer number (110010605610069).

Almost surely, 2^{220021211220137} is an apocalyptic number.

It is an amenable number.

220021211220137 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021211220137 is an equidigital number, since it uses as much as digits as its factorization.

220021211220137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 220021211220137 its reverse (731022112120022), we get a palindrome (951043323340159).

The spelling of 220021211220137 in words is "two hundred twenty trillion, twenty-one billion, two hundred eleven million, two hundred twenty thousand, one hundred thirty-seven".