2121642142 has 4 divisors (see below), whose sum is σ = 3182463216. Its totient is φ = 1060821070.

The previous prime is 2121642137. The next prime is 2121642179. The reversal of 2121642142 is 2412461212.

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

It is a congruent number.

It is an unprimeable number.

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, 530410534 + ... + 530410537.

It is an arithmetic number, because the mean of its divisors is an integer number (795615804).

Almost surely, 2^2121642142 is an apocalyptic number.

2121642142 is a deficient number, since it is larger than the sum of its proper divisors (1060821074).

2121642142 is a wasteful number, since it uses less digits than its factorization.

2121642142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060821073.

The product of its digits is 1536, while the sum is 25.

The square root of 2121642142 is about 46061.2868035621. The cubic root of 2121642142 is about 1284.9632619817.

The spelling of 2121642142 in words is "two billion, one hundred twenty-one million, six hundred forty-two thousand, one hundred forty-two".