221122000010100 has 144 divisors (see below), whose sum is σ = 731306037667968. Its totient is φ = 50533234268160.

The previous prime is 221122000010039. The next prime is 221122000010113. The reversal of 221122000010100 is 1010000221122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2572984 + ... + 21186416.

It is an arithmetic number, because the mean of its divisors is an integer number (5078514150472).

Almost surely, 2^{221122000010100} is an apocalyptic number.

221122000010100 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 221122000010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365653018833984).

221122000010100 is an abundant number, since it is smaller than the sum of its proper divisors (510184037657868).

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

221122000010100 is a wasteful number, since it uses less digits than its factorization.

221122000010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18619114 (or 18619107 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221122000010100 its reverse (1010000221122), we get a palindrome (222132000231222).

The spelling of 221122000010100 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, ten thousand, one hundred".