21101243222 has 8 divisors (see below), whose sum is σ = 31653030000. Its totient is φ = 10550233224.

The previous prime is 21101243213. The next prime is 21101243263. The reversal of 21101243222 is 22234210112.

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 = 21101243194 and 21101243203.

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, 120722 + ... + 238277.

It is an arithmetic number, because the mean of its divisors is an integer number (3956628750).

Almost surely, 2^21101243222 is an apocalyptic number.

21101243222 is a deficient number, since it is larger than the sum of its proper divisors (10551786778).

21101243222 is a wasteful number, since it uses less digits than its factorization.

21101243222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388390.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21101243222 its reverse (22234210112), we get a palindrome (43335453334).

The spelling of 21101243222 in words is "twenty-one billion, one hundred one million, two hundred forty-three thousand, two hundred twenty-two".