121310040 has 32 divisors (see below), whose sum is σ = 363930480. Its totient is φ = 32349312.

The previous prime is 121309997. The next prime is 121310069. The reversal of 121310040 is 40013121.

It is a happy number.

It is a super-2 number, since 2×121310040² = 29432251609603200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121309998 and 121310025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505339 + ... + 505578.

Almost surely, 2^121310040 is an apocalyptic number.

121310040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121310040 is an abundant number, since it is smaller than the sum of its proper divisors (242620440).

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

121310040 is a wasteful number, since it uses less digits than its factorization.

121310040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010931 (or 1010927 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121310040 is about 11014.0837113216. The cubic root of 121310040 is about 495.0308316680.

Adding to 121310040 its reverse (40013121), we get a palindrome (161323161).

The spelling of 121310040 in words is "one hundred twenty-one million, three hundred ten thousand, forty".