121012142 has 4 divisors (see below), whose sum is σ = 181518216. Its totient is φ = 60506070.

The previous prime is 121012141. The next prime is 121012183. The reversal of 121012142 is 241210121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×121012142² = 29287877022856328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30253034 + ... + 30253037.

It is an arithmetic number, because the mean of its divisors is an integer number (45379554).

Almost surely, 2^121012142 is an apocalyptic number.

121012142 is a deficient number, since it is larger than the sum of its proper divisors (60506074).

121012142 is an equidigital number, since it uses as much as digits as its factorization.

121012142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60506073.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 121012142 is about 11000.5518952460. The cubic root of 121012142 is about 494.6252879571.

Adding to 121012142 its reverse (241210121), we get a palindrome (362222263).

The spelling of 121012142 in words is "one hundred twenty-one million, twelve thousand, one hundred forty-two".