1321212242 has 16 divisors (see below), whose sum is σ = 2282772480. Its totient is φ = 561774528.

The previous prime is 1321212203. The next prime is 1321212293. The reversal of 1321212242 is 2422121231.

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, 369767 + ... + 373322.

It is an arithmetic number, because the mean of its divisors is an integer number (142673280).

Almost surely, 2^1321212242 is an apocalyptic number.

1321212242 is a deficient number, since it is larger than the sum of its proper divisors (961560238).

1321212242 is a wasteful number, since it uses less digits than its factorization.

1321212242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743225.

The product of its digits is 384, while the sum is 20.

The square root of 1321212242 is about 36348.4833521290. The cubic root of 1321212242 is about 1097.2970114222.

Adding to 1321212242 its reverse (2422121231), we get a palindrome (3743333473).

The spelling of 1321212242 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, two hundred forty-two".