1220012112091 has 2 divisors, whose sum is σ = 1220012112092. Its totient is φ = 1220012112090.

The previous prime is 1220012112089. The next prime is 1220012112119. The reversal of 1220012112091 is 1902112100221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220012112091 - 2¹ = 1220012112089 is a prime.

Together with 1220012112089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1220012112031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610006056045 + 610006056046.

It is an arithmetic number, because the mean of its divisors is an integer number (610006056046).

Almost surely, 2^{1220012112091} is an apocalyptic number.

1220012112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220012112091 is an equidigital number, since it uses as much as digits as its factorization.

1220012112091 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 1220012112091 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twelve thousand, ninety-one".