2221221020220 has 72 divisors (see below), whose sum is σ = 6755767514496. Its totient is φ = 590737583232.

The previous prime is 2221221020197. The next prime is 2221221020231. The reversal of 2221221020220 is 220201221222.

2221221020220 is a `hidden beast` number, since 2 + 2 + 212 + 210 + 20 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2221221020193 and 2221221020202.

It is a congruent number.

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, 16474572 + ... + 16608851.

It is an arithmetic number, because the mean of its divisors is an integer number (93830104368).

Almost surely, 2^{2221221020220} is an apocalyptic number.

2221221020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221221020220 is an abundant number, since it is smaller than the sum of its proper divisors (4534546494276).

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

2221221020220 is a wasteful number, since it uses less digits than its factorization.

2221221020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33083811 (or 33083806 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2221221020220 its reverse (220201221222), we get a palindrome (2441422241442).

The spelling of 2221221020220 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty thousand, two hundred twenty".