221332013081 has 2 divisors, whose sum is σ = 221332013082. Its totient is φ = 221332013080.

The previous prime is 221332013059. The next prime is 221332013101. The reversal of 221332013081 is 180310233122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111052230025 + 110279783056 = 333245^2 + 332084^2 .

It is a cyclic number.

It is not a de Polignac number, because 221332013081 - 2⁶ = 221332013017 is a prime.

It is a super-2 number, since 2×221332013081² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221332013081.

It is not a weakly prime, because it can be changed into another prime (221332013011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666006540 + 110666006541.

It is an arithmetic number, because the mean of its divisors is an integer number (110666006541).

Almost surely, 2^221332013081 is an apocalyptic number.

It is an amenable number.

221332013081 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332013081 is an equidigital number, since it uses as much as digits as its factorization.

221332013081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 221332013081 in words is "two hundred twenty-one billion, three hundred thirty-two million, thirteen thousand, eighty-one".