121133142 has 48 divisors (see below), whose sum is σ = 283439520. Its totient is φ = 37166976.

The previous prime is 121133141. The next prime is 121133161. The reversal of 121133142 is 241331121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121133141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143959 + ... + 144797.

It is an arithmetic number, because the mean of its divisors is an integer number (5904990).

Almost surely, 2^121133142 is an apocalyptic number.

121133142 is an abundant number, since it is smaller than the sum of its proper divisors (162306378).

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

121133142 is a wasteful number, since it uses less digits than its factorization.

121133142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477 (or 1474 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121133142 is about 11006.0502452060. The cubic root of 121133142 is about 494.7900915932.

Adding to 121133142 its reverse (241331121), we get a palindrome (362464263).

The spelling of 121133142 in words is "one hundred twenty-one million, one hundred thirty-three thousand, one hundred forty-two".