121030542042091 has 24 divisors (see below), whose sum is σ = 136389728597472. Its totient is φ = 107256384892800.

The previous prime is 121030542042041. The next prime is 121030542042209. The reversal of 121030542042091 is 190240245030121.

It is not a de Polignac number, because 121030542042091 - 2⁷ = 121030542041963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121030542042041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3906696 + ... + 16041301.

It is an arithmetic number, because the mean of its divisors is an integer number (5682905358228).

Almost surely, 2^{121030542042091} is an apocalyptic number.

121030542042091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121030542042091 is a deficient number, since it is larger than the sum of its proper divisors (15359186555381).

121030542042091 is a wasteful number, since it uses less digits than its factorization.

121030542042091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19949283 (or 19949272 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 121030542042091 in words is "one hundred twenty-one trillion, thirty billion, five hundred forty-two million, forty-two thousand, ninety-one".