1200022011281 has 2 divisors, whose sum is σ = 1200022011282. Its totient is φ = 1200022011280.

The previous prime is 1200022011217. The next prime is 1200022011301. The reversal of 1200022011281 is 1821102200021.

It is an a-pointer prime, because the next prime (1200022011301) can be obtained adding 1200022011281 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1039208981056 + 160813030225 = 1019416^2 + 401015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200022011281 - 2⁶ = 1200022011217 is a prime.

It is a super-2 number, since 2×1200022011281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1200022017281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600011005640 + 600011005641.

It is an arithmetic number, because the mean of its divisors is an integer number (600011005641).

Almost surely, 2^{1200022011281} is an apocalyptic number.

It is an amenable number.

1200022011281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200022011281 is an equidigital number, since it uses as much as digits as its factorization.

1200022011281 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 20.

The spelling of 1200022011281 in words is "one trillion, two hundred billion, twenty-two million, eleven thousand, two hundred eighty-one".