121182021 has 16 divisors (see below), whose sum is σ = 179737600. Its totient is φ = 80694144.

The previous prime is 121182013. The next prime is 121182023. The reversal of 121182021 is 120281121.

It is not a de Polignac number, because 121182021 - 2³ = 121182013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121181985 and 121182003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121182023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27285 + ... + 31413.

It is an arithmetic number, because the mean of its divisors is an integer number (11233600).

Almost surely, 2^121182021 is an apocalyptic number.

It is an amenable number.

121182021 is a deficient number, since it is larger than the sum of its proper divisors (58555579).

121182021 is a wasteful number, since it uses less digits than its factorization.

121182021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225 (or 5219 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 121182021 is about 11008.2705726195. The cubic root of 121182021 is about 494.8566343308.

The spelling of 121182021 in words is "one hundred twenty-one million, one hundred eighty-two thousand, twenty-one".