2211100021020 has 96 divisors (see below), whose sum is σ = 6756047182080. Its totient is φ = 535854274560.

The previous prime is 2211100020967. The next prime is 2211100021103. The reversal of 2211100021020 is 201200011122.

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 = 2211100020987 and 2211100021005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1557996 + ... + 2617164.

It is an arithmetic number, because the mean of its divisors is an integer number (70375491480).

Almost surely, 2^{2211100021020} is an apocalyptic number.

2211100021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211100021020 is an abundant number, since it is smaller than the sum of its proper divisors (4544947161060).

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

2211100021020 is a wasteful number, since it uses less digits than its factorization.

2211100021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062355 (or 1062353 counting only the distinct ones).

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

Adding to 2211100021020 its reverse (201200011122), we get a palindrome (2412300032142).

The spelling of 2211100021020 in words is "two trillion, two hundred eleven billion, one hundred million, twenty-one thousand, twenty".