2102142120 has 64 divisors (see below), whose sum is σ = 6791541120. Its totient is φ = 517449984.

The previous prime is 2102142103. The next prime is 2102142131. The reversal of 2102142120 is 212412012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2102142120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672204 + ... + 675323.

It is an arithmetic number, because the mean of its divisors is an integer number (106117830).

Almost surely, 2^2102142120 is an apocalyptic number.

2102142120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102142120 is an abundant number, since it is smaller than the sum of its proper divisors (4689399000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2102142120 is a wasteful number, since it uses less digits than its factorization.

2102142120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347554 (or 1347550 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2102142120 is about 45849.1234376405. The cubic root of 2102142120 is about 1281.0144383279.

Adding to 2102142120 its reverse (212412012), we get a palindrome (2314554132).

The spelling of 2102142120 in words is "two billion, one hundred two million, one hundred forty-two thousand, one hundred twenty".