121390938 has 12 divisors (see below), whose sum is σ = 263013738. Its totient is φ = 40463640.

The previous prime is 121390937. The next prime is 121390939. The reversal of 121390938 is 839093121.

It is an interprime number because it is at equal distance from previous prime (121390937) and next prime (121390939).

It can be written as a sum of positive squares in only one way, i.e., 87553449 + 33837489 = 9357^2 + 5817^2 .

It is not an unprimeable number, because it can be changed into a prime (121390933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3371953 + ... + 3371988.

Almost surely, 2^121390938 is an apocalyptic number.

121390938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121390938 is an abundant number, since it is smaller than the sum of its proper divisors (141622800).

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

121390938 is a wasteful number, since it uses less digits than its factorization.

121390938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743949 (or 6743946 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 121390938 is about 11017.7555790642. The cubic root of 121390938 is about 495.1408475839.

The spelling of 121390938 in words is "one hundred twenty-one million, three hundred ninety thousand, nine hundred thirty-eight".