221081911033 has 2 divisors, whose sum is σ = 221081911034. Its totient is φ = 221081911032.

The previous prime is 221081911031. The next prime is 221081911091. The reversal of 221081911033 is 330119180122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135834262249 + 85247648784 = 368557^2 + 291972^2 .

It is a cyclic number.

It is not a de Polignac number, because 221081911033 - 2¹ = 221081911031 is a prime.

It is a super-2 number, since 2×221081911033² (a number of 23 digits) contains 22 as substring.

Together with 221081911031, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221081910986 and 221081911004.

It is not a weakly prime, because it can be changed into another prime (221081911031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110540955516 + 110540955517.

It is an arithmetic number, because the mean of its divisors is an integer number (110540955517).

Almost surely, 2^221081911033 is an apocalyptic number.

It is an amenable number.

221081911033 is a deficient number, since it is larger than the sum of its proper divisors (1).

221081911033 is an equidigital number, since it uses as much as digits as its factorization.

221081911033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 221081911033 in words is "two hundred twenty-one billion, eighty-one million, nine hundred eleven thousand, thirty-three".