121001142 has 16 divisors (see below), whose sum is σ = 242456112. Its totient is φ = 40258080.

The previous prime is 121001141. The next prime is 121001161. The reversal of 121001142 is 241100121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15393 + ... + 21884.

It is an arithmetic number, because the mean of its divisors is an integer number (15153507).

Almost surely, 2^121001142 is an apocalyptic number.

121001142 is an abundant number, since it is smaller than the sum of its proper divisors (121454970).

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

121001142 is a wasteful number, since it uses less digits than its factorization.

121001142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37823.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121001142 is about 11000.0519089684. The cubic root of 121001142 is about 494.6103003618.

Adding to 121001142 its reverse (241100121), we get a palindrome (362101263).

The spelling of 121001142 in words is "one hundred twenty-one million, one thousand, one hundred forty-two".