21201101222 has 8 divisors (see below), whose sum is σ = 36344744976. Its totient is φ = 9086186232.

The previous prime is 21201101219. The next prime is 21201101237. The reversal of 21201101222 is 22210110212.

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

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 1514364373 = 21201101222 / (2 + 1 + 2 + 0 + 1 + 1 + 0 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21201101197 and 21201101206.

It is a congruent number.

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, 757182173 + ... + 757182200.

It is an arithmetic number, because the mean of its divisors is an integer number (4543093122).

Almost surely, 2^21201101222 is an apocalyptic number.

21201101222 is a deficient number, since it is larger than the sum of its proper divisors (15143643754).

21201101222 is a wasteful number, since it uses less digits than its factorization.

21201101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514364382.

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

Adding to 21201101222 its reverse (22210110212), we get a palindrome (43411211434).

The spelling of 21201101222 in words is "twenty-one billion, two hundred one million, one hundred one thousand, two hundred twenty-two".