21021201322 has 32 divisors (see below), whose sum is σ = 34738133760. Its totient is φ = 9460825920.

The previous prime is 21021201317. The next prime is 21021201337. The reversal of 21021201322 is 22310212012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021201296 and 21021201305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5496703 + ... + 5500525.

It is an arithmetic number, because the mean of its divisors is an integer number (1085566680).

Almost surely, 2^21021201322 is an apocalyptic number.

21021201322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021201322 is a deficient number, since it is larger than the sum of its proper divisors (13716932438).

21021201322 is a wasteful number, since it uses less digits than its factorization.

21021201322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21021201322 its reverse (22310212012), we get a palindrome (43331413334).

The spelling of 21021201322 in words is "twenty-one billion, twenty-one million, two hundred one thousand, three hundred twenty-two".