2101220004 has 24 divisors (see below), whose sum is σ = 5279989120. Its totient is φ = 646529184.

The previous prime is 2101220003. The next prime is 2101220057. The reversal of 2101220004 is 4000221012.

2101220004 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (2101220003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6734524 + ... + 6734835.

Almost surely, 2^2101220004 is an apocalyptic number.

It is an amenable number.

2101220004 is an abundant number, since it is smaller than the sum of its proper divisors (3178769116).

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

2101220004 is a wasteful number, since it uses less digits than its factorization.

2101220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13469379 (or 13469377 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2101220004 is about 45839.0663517485. The cubic root of 2101220004 is about 1280.8271029648.

Adding to 2101220004 its reverse (4000221012), we get a palindrome (6101441016).

The spelling of 2101220004 in words is "two billion, one hundred one million, two hundred twenty thousand, four".