2111221010220 has 48 divisors (see below), whose sum is σ = 6755907234048. Its totient is φ = 482564802240.

The previous prime is 2111221010209. The next prime is 2111221010221. The reversal of 2111221010220 is 220101221112.

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 2111221010220.

It is not an unprimeable number, because it can be changed into a prime (2111221010221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2513357926 + ... + 2513358765.

It is an arithmetic number, because the mean of its divisors is an integer number (140748067376).

Almost surely, 2^{2111221010220} is an apocalyptic number.

2111221010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111221010220 is an abundant number, since it is smaller than the sum of its proper divisors (4644686223828).

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

2111221010220 is a wasteful number, since it uses less digits than its factorization.

2111221010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026716710 (or 5026716708 counting only the distinct ones).

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

Adding to 2111221010220 its reverse (220101221112), we get a palindrome (2331322231332).

The spelling of 2111221010220 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, ten thousand, two hundred twenty".