1221210334 has 8 divisors (see below), whose sum is σ = 1939569408. Its totient is φ = 574687200.

The previous prime is 1221210307. The next prime is 1221210337. The reversal of 1221210334 is 4330121221.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17958942 + ... + 17959009.

It is an arithmetic number, because the mean of its divisors is an integer number (242446176).

Almost surely, 2^1221210334 is an apocalyptic number.

1221210334 is a deficient number, since it is larger than the sum of its proper divisors (718359074).

1221210334 is a wasteful number, since it uses less digits than its factorization.

1221210334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35917970.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1221210334 is about 34945.8199789331. The cubic root of 1221210334 is about 1068.8829679688.

Adding to 1221210334 its reverse (4330121221), we get a palindrome (5551331555).

The spelling of 1221210334 in words is "one billion, two hundred twenty-one million, two hundred ten thousand, three hundred thirty-four".