121017142 has 16 divisors (see below), whose sum is σ = 187369920. Its totient is φ = 58591368.

The previous prime is 121017139. The next prime is 121017161. The reversal of 121017142 is 241710121.

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, 253 + ... + 15559.

It is an arithmetic number, because the mean of its divisors is an integer number (11710620).

Almost surely, 2^121017142 is an apocalyptic number.

121017142 is a deficient number, since it is larger than the sum of its proper divisors (66352778).

121017142 is a wasteful number, since it uses less digits than its factorization.

121017142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 121017142 is about 11000.7791542236. The cubic root of 121017142 is about 494.6321002002.

Adding to 121017142 its reverse (241710121), we get a palindrome (362727263).

The spelling of 121017142 in words is "one hundred twenty-one million, seventeen thousand, one hundred forty-two".