2100021201 has 8 divisors (see below), whose sum is σ = 3111142560. Its totient is φ = 1400014116.

The previous prime is 2100021181. The next prime is 2100021281. The reversal of 2100021201 is 1021200012.

It is not a de Polignac number, because 2100021201 - 2⁶ = 2100021137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2100021281) 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 in 7 ways as a sum of consecutive naturals, for example, 38889255 + ... + 38889308.

It is an arithmetic number, because the mean of its divisors is an integer number (388892820).

Almost surely, 2^2100021201 is an apocalyptic number.

It is an amenable number.

2100021201 is a deficient number, since it is larger than the sum of its proper divisors (1011121359).

2100021201 is an equidigital number, since it uses as much as digits as its factorization.

2100021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77778572 (or 77778566 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2100021201 is about 45825.9882708491. The cubic root of 2100021201 is about 1280.5834744268.

Adding to 2100021201 its reverse (1021200012), we get a palindrome (3121221213).

The spelling of 2100021201 in words is "two billion, one hundred million, twenty-one thousand, two hundred one".