1220101011091 has 8 divisors (see below), whose sum is σ = 1284394885200. Its totient is φ = 1155814940160.

The previous prime is 1220101011047. The next prime is 1220101011139. The reversal of 1220101011091 is 1901101010221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220101011091 - 2²⁵ = 1220067456659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1220101011491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1628470 + ... + 2256571.

It is an arithmetic number, because the mean of its divisors is an integer number (160549360650).

Almost surely, 2^{1220101011091} is an apocalyptic number.

1220101011091 is a deficient number, since it is larger than the sum of its proper divisors (64293874109).

1220101011091 is a wasteful number, since it uses less digits than its factorization.

1220101011091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901589.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 1220101011091 in words is "one trillion, two hundred twenty billion, one hundred one million, eleven thousand, ninety-one".