2212021001220 has 72 divisors (see below), whose sum is σ = 6474656649216. Its totient is φ = 564225638592.

The previous prime is 2212021001173. The next prime is 2212021001257. The reversal of 2212021001220 is 221001202122.

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 2212021001220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34814212 + ... + 34877691.

Almost surely, 2^{2212021001220} is an apocalyptic number.

2212021001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2212021001220 is an abundant number, since it is smaller than the sum of its proper divisors (4262635647996).

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

2212021001220 is a wasteful number, since it uses less digits than its factorization.

2212021001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69691961 (or 69691936 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2212021001220 its reverse (221001202122), we get a palindrome (2433022203342).

The spelling of 2212021001220 in words is "two trillion, two hundred twelve billion, twenty-one million, one thousand, two hundred twenty".