221122002020 has 24 divisors (see below), whose sum is σ = 475155187584. Its totient is φ = 86391851616.

The previous prime is 221122002019. The next prime is 221122002151. The reversal of 221122002020 is 20200221122.

It is a junction number, because it is equal to n+sod(n) for n = 221122001986 and 221122002004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128558444 + ... + 128560163.

It is an arithmetic number, because the mean of its divisors is an integer number (19798132816).

Almost surely, 2^221122002020 is an apocalyptic number.

221122002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122002020 is an abundant number, since it is smaller than the sum of its proper divisors (254033185564).

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

221122002020 is a wasteful number, since it uses less digits than its factorization.

221122002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257118659 (or 257118657 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221122002020 its reverse (20200221122), we get a palindrome (241322223142).

The spelling of 221122002020 in words is "two hundred twenty-one billion, one hundred twenty-two million, two thousand, twenty".