1221210322 has 8 divisors (see below), whose sum is σ = 1832638896. Its totient is φ = 610330692.

The previous prime is 1221210307. The next prime is 1221210337. The reversal of 1221210322 is 2230121221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221210307) and next prime (1221210337).

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 = 1221210296 and 1221210305.

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, 131628 + ... + 140599.

It is an arithmetic number, because the mean of its divisors is an integer number (229079862).

Almost surely, 2^1221210322 is an apocalyptic number.

1221210322 is a deficient number, since it is larger than the sum of its proper divisors (611428574).

1221210322 is a wasteful number, since it uses less digits than its factorization.

1221210322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274472.

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

The square root of 1221210322 is about 34945.8198072387. The cubic root of 1221210322 is about 1068.8829644677.

Adding to 1221210322 its reverse (2230121221), we get a palindrome (3451331543).

The spelling of 1221210322 in words is "one billion, two hundred twenty-one million, two hundred ten thousand, three hundred twenty-two".