221021100122 has 8 divisors (see below), whose sum is σ = 331551449856. Its totient is φ = 110503950172.

The previous prime is 221021100109. The next prime is 221021100133. The reversal of 221021100122 is 221001120122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221021100097 and 221021100106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3257978 + ... + 3325125.

It is an arithmetic number, because the mean of its divisors is an integer number (41443931232).

Almost surely, 2^221021100122 is an apocalyptic number.

221021100122 is a deficient number, since it is larger than the sum of its proper divisors (110530349734).

221021100122 is a wasteful number, since it uses less digits than its factorization.

221021100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599892.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221021100122 its reverse (221001120122), we get a palindrome (442022220244).

The spelling of 221021100122 in words is "two hundred twenty-one billion, twenty-one million, one hundred thousand, one hundred twenty-two".