1221312122 has 8 divisors (see below), whose sum is σ = 1832147616. Its totient is φ = 610596252.

The previous prime is 1221312091. The next prime is 1221312149. The reversal of 1221312122 is 2212131221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221312122.

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, 2753 + ... + 49499.

It is an arithmetic number, because the mean of its divisors is an integer number (229018452).

Almost surely, 2^1221312122 is an apocalyptic number.

1221312122 is a deficient number, since it is larger than the sum of its proper divisors (610835494).

1221312122 is a wasteful number, since it uses less digits than its factorization.

1221312122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59812.

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

The square root of 1221312122 is about 34947.2763173327. The cubic root of 1221312122 is about 1068.9126643102.

Adding to 1221312122 its reverse (2212131221), we get a palindrome (3433443343).

The spelling of 1221312122 in words is "one billion, two hundred twenty-one million, three hundred twelve thousand, one hundred twenty-two".