1213220719 has 2 divisors, whose sum is σ = 1213220720. Its totient is φ = 1213220718.

The previous prime is 1213220707. The next prime is 1213220753. The reversal of 1213220719 is 9170223121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213220719 - 2⁹ = 1213220207 is a prime.

It is a super-2 number, since 2×1213220719² = 2943809026021753922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213220219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610359 + 606610360.

It is an arithmetic number, because the mean of its divisors is an integer number (606610360).

Almost surely, 2^1213220719 is an apocalyptic number.

1213220719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213220719 is an equidigital number, since it uses as much as digits as its factorization.

1213220719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1213220719 is about 34831.3180772706. The cubic root of 1213220719 is about 1066.5468551735.

The spelling of 1213220719 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, seven hundred nineteen".