221212013333081 has 2 divisors, whose sum is σ = 221212013333082. Its totient is φ = 221212013333080.

The previous prime is 221212013333021. The next prime is 221212013333329. The reversal of 221212013333081 is 180333310212122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220958711502400 + 253301830681 = 14864680^2 + 503291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221212013333081 is a prime.

It is a super-2 number, since 2×221212013333081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221212013333021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606006666540 + 110606006666541.

It is an arithmetic number, because the mean of its divisors is an integer number (110606006666541).

Almost surely, 2^{221212013333081} is an apocalyptic number.

It is an amenable number.

221212013333081 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212013333081 is an equidigital number, since it uses as much as digits as its factorization.

221212013333081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 221212013333081 in words is "two hundred twenty-one trillion, two hundred twelve billion, thirteen million, three hundred thirty-three thousand, eighty-one".