121022002191 has 8 divisors (see below), whose sum is σ = 165298344624. Its totient is φ = 78713497280.

The previous prime is 121022002169. The next prime is 121022002207. The reversal of 121022002191 is 191200220121.

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 121022002191 - 2¹⁵ = 121021969423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022002091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491959236 + ... + 491959481.

It is an arithmetic number, because the mean of its divisors is an integer number (20662293078).

Almost surely, 2^121022002191 is an apocalyptic number.

121022002191 is a deficient number, since it is larger than the sum of its proper divisors (44276342433).

121022002191 is an equidigital number, since it uses as much as digits as its factorization.

121022002191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983918761.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 121022002191 in words is "one hundred twenty-one billion, twenty-two million, two thousand, one hundred ninety-one".