2101021104 has 80 divisors (see below), whose sum is σ = 6680183552. Its totient is φ = 554114304.

The previous prime is 2101021073. The next prime is 2101021127. The reversal of 2101021104 is 4011201012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2101021104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236134 + ... + 244869.

Almost surely, 2^2101021104 is an apocalyptic number.

2101021104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2101021104 is an abundant number, since it is smaller than the sum of its proper divisors (4579162448).

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

2101021104 is a wasteful number, since it uses less digits than its factorization.

2101021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481034 (or 481028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101021104 is about 45836.8967535980. The cubic root of 2101021104 is about 1280.7866876269.

Adding to 2101021104 its reverse (4011201012), we get a palindrome (6112222116).

The spelling of 2101021104 in words is "two billion, one hundred one million, twenty-one thousand, one hundred four".