121631442 has 8 divisors (see below), whose sum is σ = 243262896. Its totient is φ = 40543812.

The previous prime is 121631431. The next prime is 121631443. The reversal of 121631442 is 244136121.

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

121631442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (121631443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10135948 + ... + 10135959.

It is an arithmetic number, because the mean of its divisors is an integer number (30407862).

Almost surely, 2^121631442 is an apocalyptic number.

121631442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121631442 is a wasteful number, since it uses less digits than its factorization.

121631442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271912.

The product of its digits is 1152, while the sum is 24.

The square root of 121631442 is about 11028.6645610427. The cubic root of 121631442 is about 495.4676286950.

Adding to 121631442 its reverse (244136121), we get a palindrome (365767563).

The spelling of 121631442 in words is "one hundred twenty-one million, six hundred thirty-one thousand, four hundred forty-two".