121601404 has 6 divisors (see below), whose sum is σ = 212802464. Its totient is φ = 60800700.

The previous prime is 121601401. The next prime is 121601407. The reversal of 121601404 is 404106121.

It is an interprime number because it is at equal distance from previous prime (121601401) and next prime (121601407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121601401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15200172 + ... + 15200179.

Almost surely, 2^121601404 is an apocalyptic number.

It is an amenable number.

121601404 is a deficient number, since it is larger than the sum of its proper divisors (91201060).

121601404 is a wasteful number, since it uses less digits than its factorization.

121601404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30400355 (or 30400353 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 121601404 is about 11027.3026620294. The cubic root of 121601404 is about 495.4268385788.

Adding to 121601404 its reverse (404106121), we get a palindrome (525707525).

The spelling of 121601404 in words is "one hundred twenty-one million, six hundred one thousand, four hundred four".