1221211322 has 16 divisors (see below), whose sum is σ = 1888028352. Its totient is φ = 592051680.

The previous prime is 1221211291. The next prime is 1221211331. The reversal of 1221211322 is 2231121221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221211322.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32318 + ... + 59049.

It is an arithmetic number, because the mean of its divisors is an integer number (118001772).

Almost surely, 2^1221211322 is an apocalyptic number.

1221211322 is a deficient number, since it is larger than the sum of its proper divisors (666817030).

1221211322 is a wasteful number, since it uses less digits than its factorization.

1221211322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91573.

The product of its digits is 96, while the sum is 17.

The square root of 1221211322 is about 34945.8341150988. The cubic root of 1221211322 is about 1068.8832562227.

Adding to 1221211322 its reverse (2231121221), we get a palindrome (3452332543).

The spelling of 1221211322 in words is "one billion, two hundred twenty-one million, two hundred eleven thousand, three hundred twenty-two".