1210120202091 has 4 divisors (see below), whose sum is σ = 1613493602792. Its totient is φ = 806746801392.

The previous prime is 1210120202029. The next prime is 1210120202119. The reversal of 1210120202091 is 1902020210121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1210120202091 - 2⁹ = 1210120201579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210120202191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201686700346 + ... + 201686700351.

It is an arithmetic number, because the mean of its divisors is an integer number (403373400698).

Almost surely, 2^{1210120202091} is an apocalyptic number.

1210120202091 is a deficient number, since it is larger than the sum of its proper divisors (403373400701).

1210120202091 is an equidigital number, since it uses as much as digits as its factorization.

1210120202091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403373400700.

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

The spelling of 1210120202091 in words is "one trillion, two hundred ten billion, one hundred twenty million, two hundred two thousand, ninety-one".