2100021130 has 32 divisors (see below), whose sum is σ = 3814128000. Its totient is φ = 832468032.

The previous prime is 2100021103. The next prime is 2100021137. The reversal of 2100021130 is 311200012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2100021137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533349 + ... + 537271.

It is an arithmetic number, because the mean of its divisors is an integer number (119191500).

Almost surely, 2^2100021130 is an apocalyptic number.

2100021130 is a deficient number, since it is larger than the sum of its proper divisors (1714106870).

2100021130 is a wasteful number, since it uses less digits than its factorization.

2100021130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4398.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2100021130 is about 45825.9874961795. The cubic root of 2100021130 is about 1280.5834599950.

Adding to 2100021130 its reverse (311200012), we get a palindrome (2411221142).

The spelling of 2100021130 in words is "two billion, one hundred million, twenty-one thousand, one hundred thirty".