121021120199 has 16 divisors (see below), whose sum is σ = 142702613760. Its totient is φ = 100474223040.

The previous prime is 121021120169. The next prime is 121021120229. The reversal of 121021120199 is 991021120121.

It is an interprime number because it is at equal distance from previous prime (121021120169) and next prime (121021120229).

It is a cyclic number.

It is not a de Polignac number, because 121021120199 - 2²⁸ = 120752684743 is a prime.

It is a super-2 number, since 2×121021120199² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021120109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1476929 + ... + 1556714.

It is an arithmetic number, because the mean of its divisors is an integer number (8918913360).

Almost surely, 2^121021120199 is an apocalyptic number.

121021120199 is a deficient number, since it is larger than the sum of its proper divisors (21681493561).

121021120199 is a wasteful number, since it uses less digits than its factorization.

121021120199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033830.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 121021120199 in words is "one hundred twenty-one billion, twenty-one million, one hundred twenty thousand, one hundred ninety-nine".