221122221011020 has 72 divisors (see below), whose sum is σ = 540399179604816. Its totient is φ = 75781166944896.

The previous prime is 221122221010973. The next prime is 221122221011053. The reversal of 221122221011020 is 20110122221122.

It is a super-2 number, since 2×221122221011020² (a number of 29 digits) contains 22 as substring.

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, 45554994 + ... + 50174713.

It is an arithmetic number, because the mean of its divisors is an integer number (7505544161178).

Almost surely, 2^{221122221011020} is an apocalyptic number.

221122221011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122221011020 is an abundant number, since it is smaller than the sum of its proper divisors (319276958593796).

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

221122221011020 is a wasteful number, since it uses less digits than its factorization.

221122221011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95732087 (or 95732078 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221122221011020 its reverse (20110122221122), we get a palindrome (241232343232142).

The spelling of 221122221011020 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, eleven thousand, twenty".