1221421334 has 12 divisors (see below), whose sum is σ = 2131255764. Its totient is φ = 523466244.

The previous prime is 1221421309. The next prime is 1221421339. The reversal of 1221421334 is 4331241221.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221421339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6231644 + ... + 6231839.

It is an arithmetic number, because the mean of its divisors is an integer number (177604647).

Almost surely, 2^1221421334 is an apocalyptic number.

1221421334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221421334 is a deficient number, since it is larger than the sum of its proper divisors (909834430).

1221421334 is a wasteful number, since it uses less digits than its factorization.

1221421334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12463499 (or 12463492 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 1221421334 is about 34948.8388076056. The cubic root of 1221421334 is about 1068.9445247462.

Adding to 1221421334 its reverse (4331241221), we get a palindrome (5552662555).

The spelling of 1221421334 in words is "one billion, two hundred twenty-one million, four hundred twenty-one thousand, three hundred thirty-four".