2101211112220 has 96 divisors (see below), whose sum is σ = 5261256032256. Its totient is φ = 695933260800.

The previous prime is 2101211112173. The next prime is 2101211112257. The reversal of 2101211112220 is 222111121012.

It is a junction number, because it is equal to n+sod(n) for n = 2101211112194 and 2101211112203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8945692 + ... + 9177571.

It is an arithmetic number, because the mean of its divisors is an integer number (54804750336).

Almost surely, 2^{2101211112220} is an apocalyptic number.

2101211112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101211112220 is an abundant number, since it is smaller than the sum of its proper divisors (3160044920036).

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

2101211112220 is a wasteful number, since it uses less digits than its factorization.

2101211112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18123331 (or 18123329 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2101211112220 its reverse (222111121012), we get a palindrome (2323322233232).

The spelling of 2101211112220 in words is "two trillion, one hundred one billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty".