2111021012220 has 24 divisors (see below), whose sum is σ = 5910858834384. Its totient is φ = 562938936576.

The previous prime is 2111021012213. The next prime is 2111021012267. The reversal of 2111021012220 is 222101201112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2111021012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17591841709 + ... + 17591841828.

It is an arithmetic number, because the mean of its divisors is an integer number (246285784766).

Almost surely, 2^{2111021012220} is an apocalyptic number.

2111021012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111021012220 is an abundant number, since it is smaller than the sum of its proper divisors (3799837822164).

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

2111021012220 is a wasteful number, since it uses less digits than its factorization.

2111021012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35183683549 (or 35183683547 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2111021012220 its reverse (222101201112), we get a palindrome (2333122213332).

The spelling of 2111021012220 in words is "two trillion, one hundred eleven billion, twenty-one million, twelve thousand, two hundred twenty".