1220011012291 has 2 divisors, whose sum is σ = 1220011012292. Its totient is φ = 1220011012290.

The previous prime is 1220011012249. The next prime is 1220011012321. The reversal of 1220011012291 is 1922101100221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220011012291 - 2²⁵ = 1219977457859 is a prime.

It is a super-2 number, since 2×1220011012291² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220011010291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610005506145 + 610005506146.

It is an arithmetic number, because the mean of its divisors is an integer number (610005506146).

Almost surely, 2^{1220011012291} is an apocalyptic number.

1220011012291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220011012291 is an equidigital number, since it uses as much as digits as its factorization.

1220011012291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1220011012291 in words is "one trillion, two hundred twenty billion, eleven million, twelve thousand, two hundred ninety-one".