1212021122281 has 2 divisors, whose sum is σ = 1212021122282. Its totient is φ = 1212021122280.

The previous prime is 1212021122173. The next prime is 1212021122297. The reversal of 1212021122281 is 1822211202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1181534216256 + 30486906025 = 1086984^2 + 174605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212021122281 is a prime.

It is a super-2 number, since 2×1212021122281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212021122881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010561140 + 606010561141.

It is an arithmetic number, because the mean of its divisors is an integer number (606010561141).

Almost surely, 2^{1212021122281} is an apocalyptic number.

It is an amenable number.

1212021122281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021122281 is an equidigital number, since it uses as much as digits as its factorization.

1212021122281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 25.

The spelling of 1212021122281 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred eighty-one".