1219234921 has 8 divisors (see below), whose sum is σ = 1284876320. Its totient is φ = 1153740672.

The previous prime is 1219234909. The next prime is 1219234931. The reversal of 1219234921 is 1294329121.

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

It is a cyclic number.

It is not a de Polignac number, because 1219234921 - 2⁹ = 1219234409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219234931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19560 + ... + 53113.

It is an arithmetic number, because the mean of its divisors is an integer number (160609540).

Almost surely, 2^1219234921 is an apocalyptic number.

It is an amenable number.

1219234921 is a deficient number, since it is larger than the sum of its proper divisors (65641399).

1219234921 is an equidigital number, since it uses as much as digits as its factorization.

1219234921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73575.

The product of its digits is 7776, while the sum is 34.

The square root of 1219234921 is about 34917.5446015323. The cubic root of 1219234921 is about 1068.3063201468.

The spelling of 1219234921 in words is "one billion, two hundred nineteen million, two hundred thirty-four thousand, nine hundred twenty-one".