2102101100220 has 48 divisors (see below), whose sum is σ = 6420963362688. Its totient is φ = 509600266560.

The previous prime is 2102101100219. The next prime is 2102101100243. The reversal of 2102101100220 is 220011012012.

It is a super-2 number, since 2×2102101100220² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 2102101100196 and 2102101100205.

It is a congruent number.

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, 1592500174 + ... + 1592501493.

It is an arithmetic number, because the mean of its divisors is an integer number (133770070056).

Almost surely, 2^{2102101100220} is an apocalyptic number.

2102101100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102101100220 is an abundant number, since it is smaller than the sum of its proper divisors (4318862262468).

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

2102101100220 is a wasteful number, since it uses less digits than its factorization.

2102101100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185001690 (or 3185001688 counting only the distinct ones).

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

Adding to 2102101100220 its reverse (220011012012), we get a palindrome (2322112112232).

The spelling of 2102101100220 in words is "two trillion, one hundred two billion, one hundred one million, one hundred thousand, two hundred twenty".