121937378 has 4 divisors (see below), whose sum is σ = 182906070. Its totient is φ = 60968688.

The previous prime is 121937377. The next prime is 121937381. The reversal of 121937378 is 873739121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 116143729 + 5793649 = 10777^2 + 2407^2 .

It is not an unprimeable number, because it can be changed into a prime (121937371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30484343 + ... + 30484346.

Almost surely, 2^121937378 is an apocalyptic number.

121937378 is a deficient number, since it is larger than the sum of its proper divisors (60968692).

121937378 is an equidigital number, since it uses as much as digits as its factorization.

121937378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60968691.

The product of its digits is 63504, while the sum is 41.

The square root of 121937378 is about 11042.5258885818. The cubic root of 121937378 is about 495.8826926233.

The spelling of 121937378 in words is "one hundred twenty-one million, nine hundred thirty-seven thousand, three hundred seventy-eight".