121022121099 has 24 divisors (see below), whose sum is σ = 186700803520. Its totient is φ = 69486381360.

The previous prime is 121022121097. The next prime is 121022121113. The reversal of 121022121099 is 990121220121.

It is not a de Polignac number, because 121022121099 - 2¹ = 121022121097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121022121097) 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, 8766637 + ... + 8780430.

Almost surely, 2^121022121099 is an apocalyptic number.

121022121099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121022121099 is a deficient number, since it is larger than the sum of its proper divisors (65678682421).

121022121099 is a wasteful number, since it uses less digits than its factorization.

121022121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17547111 (or 17547100 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 121022121099 in words is "one hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, ninety-nine".