220101210210181 has 2 divisors, whose sum is σ = 220101210210182. Its totient is φ = 220101210210180.

The previous prime is 220101210210173. The next prime is 220101210210223. The reversal of 220101210210181 is 181012012101022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178521398216100 + 41579811994081 = 13361190^2 + 6448241^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101210210181 - 2³ = 220101210210173 is a prime.

It is a super-2 number, since 2×220101210210181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220101210210121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050605105090 + 110050605105091.

It is an arithmetic number, because the mean of its divisors is an integer number (110050605105091).

Almost surely, 2^{220101210210181} is an apocalyptic number.

It is an amenable number.

220101210210181 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101210210181 is an equidigital number, since it uses as much as digits as its factorization.

220101210210181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 220101210210181 in words is "two hundred twenty trillion, one hundred one billion, two hundred ten million, two hundred ten thousand, one hundred eighty-one".