121056019 has 20 divisors (see below), whose sum is σ = 142694144. Its totient is φ = 102685968.

The previous prime is 121055999. The next prime is 121056029. The reversal of 121056019 is 910650121.

It is not a de Polignac number, because 121056019 - 2¹¹ = 121053971 is a prime.

It is a super-2 number, since 2×121056019² = 29309119472256722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121055984 and 121056002.

It is not an unprimeable number, because it can be changed into a prime (121056029) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 304729 + ... + 305125.

Almost surely, 2^121056019 is an apocalyptic number.

121056019 is a deficient number, since it is larger than the sum of its proper divisors (21638125).

121056019 is an frugal number, since it uses more digits than its factorization.

121056019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 121056019 is about 11002.5460235347. The cubic root of 121056019 is about 494.6850617146.

The spelling of 121056019 in words is "one hundred twenty-one million, fifty-six thousand, nineteen".