121322440 has 16 divisors (see below), whose sum is σ = 272975580. Its totient is φ = 48528960.

The previous prime is 121322431. The next prime is 121322449. The reversal of 121322440 is 44223121.

It is an interprime number because it is at equal distance from previous prime (121322431) and next prime (121322449).

It can be written as a sum of positive squares in 2 ways, for example, as 115648516 + 5673924 = 10754^2 + 2382^2 .

It is not an unprimeable number, because it can be changed into a prime (121322449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516491 + ... + 1516570.

Almost surely, 2^121322440 is an apocalyptic number.

121322440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121322440 is an abundant number, since it is smaller than the sum of its proper divisors (151653140).

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

121322440 is a wasteful number, since it uses less digits than its factorization.

121322440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033072 (or 3033068 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 121322440 is about 11014.6466125791. The cubic root of 121322440 is about 495.0476980191.

Adding to 121322440 its reverse (44223121), we get a palindrome (165545561).

It can be divided in two parts, 1213 and 22440, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 121322440 in words is "one hundred twenty-one million, three hundred twenty-two thousand, four hundred forty".