121404142 has 4 divisors (see below), whose sum is σ = 182106216. Its totient is φ = 60702070.

The previous prime is 121404131. The next prime is 121404181. The reversal of 121404142 is 241404121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241404121 = 7 ⋅34486303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30351034 + ... + 30351037.

It is an arithmetic number, because the mean of its divisors is an integer number (45526554).

Almost surely, 2^121404142 is an apocalyptic number.

121404142 is a deficient number, since it is larger than the sum of its proper divisors (60702074).

121404142 is an equidigital number, since it uses as much as digits as its factorization.

121404142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60702073.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 121404142 is about 11018.3547773703. The cubic root of 121404142 is about 495.1587995080.

Adding to 121404142 its reverse (241404121), we get a palindrome (362808263).

The spelling of 121404142 in words is "one hundred twenty-one million, four hundred four thousand, one hundred forty-two".