121213142 has 16 divisors (see below), whose sum is σ = 185414400. Its totient is φ = 59418432.

The previous prime is 121213129. The next prime is 121213163. The reversal of 121213142 is 241312121.

It is a self number, because there is not a number n which added to its sum of digits gives 121213142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22859 + ... + 27657.

It is an arithmetic number, because the mean of its divisors is an integer number (11588400).

Almost surely, 2^121213142 is an apocalyptic number.

121213142 is a deficient number, since it is larger than the sum of its proper divisors (64201258).

121213142 is a wasteful number, since it uses less digits than its factorization.

121213142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047.

The product of its digits is 96, while the sum is 17.

The square root of 121213142 is about 11009.6840099977. The cubic root of 121213142 is about 494.8989924161.

Adding to 121213142 its reverse (241312121), we get a palindrome (362525263).

The spelling of 121213142 in words is "one hundred twenty-one million, two hundred thirteen thousand, one hundred forty-two".