121011102091 has 16 divisors (see below), whose sum is σ = 139791990240. Its totient is φ = 103528199680.

The previous prime is 121011102071. The next prime is 121011102103. The reversal of 121011102091 is 190201110121.

It is a cyclic number.

It is not a de Polignac number, because 121011102091 - 2¹³ = 121011093899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121011102001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2163465 + ... + 2218693.

It is an arithmetic number, because the mean of its divisors is an integer number (8736999390).

Almost surely, 2^121011102091 is an apocalyptic number.

121011102091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121011102091 is a deficient number, since it is larger than the sum of its proper divisors (18780888149).

121011102091 is a wasteful number, since it uses less digits than its factorization.

121011102091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66974.

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

The spelling of 121011102091 in words is "one hundred twenty-one billion, eleven million, one hundred two thousand, ninety-one".