121000202109 has 8 divisors (see below), whose sum is σ = 179259558720. Its totient is φ = 80666801388.

The previous prime is 121000202101. The next prime is 121000202111. The reversal of 121000202109 is 901202000121.

It is not a de Polignac number, because 121000202109 - 2³ = 121000202101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000202091 and 121000202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000202101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240744457 + ... + 2240744510.

It is an arithmetic number, because the mean of its divisors is an integer number (22407444840).

Almost surely, 2^121000202109 is an apocalyptic number.

It is an amenable number.

121000202109 is a deficient number, since it is larger than the sum of its proper divisors (58259356611).

121000202109 is an equidigital number, since it uses as much as digits as its factorization.

121000202109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481488976 (or 4481488970 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 121000202109 in words is "one hundred twenty-one billion, two hundred two thousand, one hundred nine".