220231020020177 has 2 divisors, whose sum is σ = 220231020020178. Its totient is φ = 220231020020176.

The previous prime is 220231020020149. The next prime is 220231020020203. The reversal of 220231020020177 is 771020020132022.

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., 146692574412241 + 73538445607936 = 12111671^2 + 8575456^2 .

It is a cyclic number.

It is not a de Polignac number, because 220231020020177 - 2¹² = 220231020016081 is a prime.

It is a super-2 number, since 2×220231020020177² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220233020020177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110115510010088 + 110115510010089.

It is an arithmetic number, because the mean of its divisors is an integer number (110115510010089).

Almost surely, 2^{220231020020177} is an apocalyptic number.

It is an amenable number.

220231020020177 is a deficient number, since it is larger than the sum of its proper divisors (1).

220231020020177 is an equidigital number, since it uses as much as digits as its factorization.

220231020020177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 220231020020177 its reverse (771020020132022), we get a palindrome (991251040152199).

The spelling of 220231020020177 in words is "two hundred twenty trillion, two hundred thirty-one billion, twenty million, twenty thousand, one hundred seventy-seven".