2021013100 has 18 divisors (see below), whose sum is σ = 4385598644. Its totient is φ = 808405200.

The previous prime is 2021013077. The next prime is 2021013107. The reversal of 2021013100 is 13101202.

It is a super-2 number, since 2×2021013100² = 8168987900743220000, which contains 22 as substring.

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 (2021013107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10104966 + ... + 10105165.

Almost surely, 2^2021013100 is an apocalyptic number.

2021013100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021013100 is an abundant number, since it is smaller than the sum of its proper divisors (2364585544).

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

2021013100 is a wasteful number, since it uses less digits than its factorization.

2021013100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20210145 (or 20210138 counting only the distinct ones).

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

The square root of 2021013100 is about 44955.6792852694. The cubic root of 2021013100 is about 1264.3181606760.

Adding to 2021013100 its reverse (13101202), we get a palindrome (2034114302).

The spelling of 2021013100 in words is "two billion, twenty-one million, thirteen thousand, one hundred".