1221481319 has 2 divisors, whose sum is σ = 1221481320. Its totient is φ = 1221481318.

The previous prime is 1221481279. The next prime is 1221481351. The reversal of 1221481319 is 9131841221.

It is an a-pointer prime, because the next prime (1221481351) can be obtained adding 1221481319 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221481319 - 2²⁴ = 1204704103 is a prime.

It is a super-2 number, since 2×1221481319² = 2984033225331959522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221481379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610740659 + 610740660.

It is an arithmetic number, because the mean of its divisors is an integer number (610740660).

Almost surely, 2^1221481319 is an apocalyptic number.

1221481319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221481319 is an equidigital number, since it uses as much as digits as its factorization.

1221481319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 1221481319 is about 34949.6969800884. The cubic root of 1221481319 is about 1068.9620233729.

The spelling of 1221481319 in words is "one billion, two hundred twenty-one million, four hundred eighty-one thousand, three hundred nineteen".