121207438 has 8 divisors (see below), whose sum is σ = 198339480. Its totient is φ = 55094280.

The previous prime is 121207423. The next prime is 121207451. The reversal of 121207438 is 834702121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2754693 + ... + 2754736.

It is an arithmetic number, because the mean of its divisors is an integer number (24792435).

Almost surely, 2^121207438 is an apocalyptic number.

121207438 is a deficient number, since it is larger than the sum of its proper divisors (77132042).

121207438 is a wasteful number, since it uses less digits than its factorization.

121207438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509442.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 121207438 is about 11009.4249622766. The cubic root of 121207438 is about 494.8912293741.

Adding to 121207438 its reverse (834702121), we get a palindrome (955909559).

The spelling of 121207438 in words is "one hundred twenty-one million, two hundred seven thousand, four hundred thirty-eight".