2100101004 has 36 divisors (see below), whose sum is σ = 5491646160. Its totient is φ = 675894240.

The previous prime is 2100100993. The next prime is 2100101009. The reversal of 2100101004 is 4001010012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (2100101009) 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, 1004752 + ... + 1006839.

Almost surely, 2^2100101004 is an apocalyptic number.

It is an amenable number.

2100101004 is an abundant number, since it is smaller than the sum of its proper divisors (3391545156).

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

2100101004 is a wasteful number, since it uses less digits than its factorization.

2100101004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011630 (or 2011625 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2100101004 is about 45826.8589802967. The cubic root of 2100101004 is about 1280.5996953914.

Adding to 2100101004 its reverse (4001010012), we get a palindrome (6101111016).

The spelling of 2100101004 in words is "two billion, one hundred million, one hundred one thousand, four".