2021001100 has 36 divisors (see below), whose sum is σ = 4393484424. Its totient is φ = 806942080.

The previous prime is 2021001091. The next prime is 2021001109. The reversal of 2021001100 is 11001202.

It is an interprime number because it is at equal distance from previous prime (2021001091) and next prime (2021001109).

It is not an unprimeable number, because it can be changed into a prime (2021001109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38352 + ... + 74248.

It is an arithmetic number, because the mean of its divisors is an integer number (122041234).

Almost surely, 2^2021001100 is an apocalyptic number.

2021001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021001100 is an abundant number, since it is smaller than the sum of its proper divisors (2372483324).

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

2021001100 is a wasteful number, since it uses less digits than its factorization.

2021001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36474 (or 36467 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2021001100 is about 44955.5458202878. The cubic root of 2021001100 is about 1264.3156583257.

Adding to 2021001100 its reverse (11001202), we get a palindrome (2032002302).

The spelling of 2021001100 in words is "two billion, twenty-one million, one thousand, one hundred".