121055240 has 32 divisors (see below), whose sum is σ = 272873880. Its totient is φ = 48333312.

The previous prime is 121055237. The next prime is 121055261. The reversal of 121055240 is 42550121.

It can be written as a sum of positive squares in 4 ways, for example, as 51466276 + 69588964 = 7174^2 + 8342^2 .

It is a super-2 number, since 2×121055240² = 29308742262915200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22052 + ... + 26988.

Almost surely, 2^121055240 is an apocalyptic number.

121055240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121055240 is an abundant number, since it is smaller than the sum of its proper divisors (151818640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121055240 is a wasteful number, since it uses less digits than its factorization.

121055240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5557 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 121055240 is about 11002.5106225806. The cubic root of 121055240 is about 494.6840006067.

The spelling of 121055240 in words is "one hundred twenty-one million, fifty-five thousand, two hundred forty".