2101002220 has 24 divisors (see below), whose sum is σ = 4451154624. Its totient is φ = 832962816.

The previous prime is 2101002193. The next prime is 2101002223. The reversal of 2101002220 is 222001012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2101002197 and 2101002206.

It is not an unprimeable number, because it can be changed into a prime (2101002223) 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, 462564 + ... + 467083.

It is an arithmetic number, because the mean of its divisors is an integer number (185464776).

Almost surely, 2^2101002220 is an apocalyptic number.

2101002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101002220 is an abundant number, since it is smaller than the sum of its proper divisors (2350152404).

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

2101002220 is a wasteful number, since it uses less digits than its factorization.

2101002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929769 (or 929767 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2101002220 is about 45836.6907618777. The cubic root of 2101002220 is about 1280.7828503740.

Adding to 2101002220 its reverse (222001012), we get a palindrome (2323003232).

The spelling of 2101002220 in words is "two billion, one hundred one million, two thousand, two hundred twenty".