3021100020 has 72 divisors (see below), whose sum is σ = 9377143776. Its totient is φ = 786889152.

The previous prime is 3021100013. The next prime is 3021100037. The reversal of 3021100020 is 200011203.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 3021099975 and 3021100011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187422 + ... + 202901.

It is an arithmetic number, because the mean of its divisors is an integer number (130238108).

Almost surely, 2^3021100020 is an apocalyptic number.

3021100020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3021100020 is an abundant number, since it is smaller than the sum of its proper divisors (6356043756).

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

3021100020 is a wasteful number, since it uses less digits than its factorization.

3021100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390381 (or 390376 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 3021100020 is about 54964.5342016104. The cubic root of 3021100020 is about 1445.6229511114.

Adding to 3021100020 its reverse (200011203), we get a palindrome (3221111223).

It can be divided in two parts, 3021 and 100020, that added together give a square (103041 = 321²).

The spelling of 3021100020 in words is "three billion, twenty-one million, one hundred thousand, twenty".