221200201021122 has 24 divisors (see below), whose sum is σ = 479297693689776. Its totient is φ = 73728693959256.

The previous prime is 221200201021091. The next prime is 221200201021133. The reversal of 221200201021122 is 221120102002122.

It is a happy number.

221200201021122 is a `hidden beast` number, since 221 + 200 + 2 + 0 + 10 + 211 + 22 = 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 = 221200201021095 and 221200201021104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391908588 + ... + 392472599.

It is an arithmetic number, because the mean of its divisors is an integer number (19970737237074).

Almost surely, 2^{221200201021122} is an apocalyptic number.

221200201021122 is an abundant number, since it is smaller than the sum of its proper divisors (258097492668654).

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

221200201021122 is a wasteful number, since it uses less digits than its factorization.

221200201021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784396862 (or 784396859 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221200201021122 its reverse (221120102002122), we get a palindrome (442320303023244).

The spelling of 221200201021122 in words is "two hundred twenty-one trillion, two hundred billion, two hundred one million, twenty-one thousand, one hundred twenty-two".