2221402154220 has 192 divisors, whose sum is σ = 7101236016000. Its totient is φ = 576085893120.

The previous prime is 2221402154189. The next prime is 2221402154287. The reversal of 2221402154220 is 224512041222.

2221402154220 is a `hidden beast` number, since 2 + 2 + 21 + 4 + 0 + 215 + 422 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43151056 + ... + 43202504.

It is an arithmetic number, because the mean of its divisors is an integer number (36985604250).

Almost surely, 2^{2221402154220} is an apocalyptic number.

2221402154220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221402154220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3550618008000).

2221402154220 is an abundant number, since it is smaller than the sum of its proper divisors (4879833861780).

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

2221402154220 is a wasteful number, since it uses less digits than its factorization.

2221402154220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53665 (or 53657 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 2221402154220 its reverse (224512041222), we get a palindrome (2445914195442).

The spelling of 2221402154220 in words is "two trillion, two hundred twenty-one billion, four hundred two million, one hundred fifty-four thousand, two hundred twenty".