2142102121 has 4 divisors (see below), whose sum is σ = 2142387072. Its totient is φ = 2141817172.

The previous prime is 2142102101. The next prime is 2142102211. The reversal of 2142102121 is 1212012412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2142102121 - 2⁷ = 2142101993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2142102095 and 2142102104.

It is not an unprimeable number, because it can be changed into a prime (2142102101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130885 + ... + 146338.

It is an arithmetic number, because the mean of its divisors is an integer number (535596768).

Almost surely, 2^2142102121 is an apocalyptic number.

It is an amenable number.

2142102121 is a deficient number, since it is larger than the sum of its proper divisors (284951).

2142102121 is an equidigital number, since it uses as much as digits as its factorization.

2142102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284950.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2142102121 is about 46282.8491020162. The cubic root of 2142102121 is about 1289.0805540840.

Adding to 2142102121 its reverse (1212012412), we get a palindrome (3354114533).

The spelling of 2142102121 in words is "two billion, one hundred forty-two million, one hundred two thousand, one hundred twenty-one".