121011102090 has 64 divisors (see below), whose sum is σ = 327116822400. Its totient is φ = 31827572352.

The previous prime is 121011102071. The next prime is 121011102103. The reversal of 121011102090 is 90201110121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3050080 + ... + 3089499.

It is an arithmetic number, because the mean of its divisors is an integer number (5111200350).

Almost surely, 2^121011102090 is an apocalyptic number.

121011102090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121011102090 is an abundant number, since it is smaller than the sum of its proper divisors (206105720310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121011102090 is a wasteful number, since it uses less digits than its factorization.

121011102090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139668 (or 6139662 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 121011102090 in words is "one hundred twenty-one billion, eleven million, one hundred two thousand, ninety".