2100020321 has 16 divisors (see below), whose sum is σ = 2512355328. Its totient is φ = 1717405200.

The previous prime is 2100020243. The next prime is 2100020327. The reversal of 2100020321 is 1230200012.

It is a happy number.

It is not a de Polignac number, because 2100020321 - 2²² = 2095826017 is a prime.

It is a super-2 number, since 2×2100020321² = 8820170697225886082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2100020327) 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, 52745 + ... + 83558.

It is an arithmetic number, because the mean of its divisors is an integer number (157022208).

Almost surely, 2^2100020321 is an apocalyptic number.

It is an amenable number.

2100020321 is a deficient number, since it is larger than the sum of its proper divisors (412335007).

2100020321 is a wasteful number, since it uses less digits than its factorization.

2100020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136412.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2100020321 is about 45825.9786693094. The cubic root of 2100020321 is about 1280.5832955534.

Adding to 2100020321 its reverse (1230200012), we get a palindrome (3330220333).

The spelling of 2100020321 in words is "two billion, one hundred million, twenty thousand, three hundred twenty-one".