1212223169 has 2 divisors, whose sum is σ = 1212223170. Its totient is φ = 1212223168.

The previous prime is 1212223141. The next prime is 1212223213. The reversal of 1212223169 is 9613222121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 915970225 + 296252944 = 30265^2 + 17212^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212223169 - 2¹⁶ = 1212157633 is a prime.

It is a super-2 number, since 2×1212223169² = 2938970022920805122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212223669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606111584 + 606111585.

It is an arithmetic number, because the mean of its divisors is an integer number (606111585).

Almost surely, 2^1212223169 is an apocalyptic number.

It is an amenable number.

1212223169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212223169 is an equidigital number, since it uses as much as digits as its factorization.

1212223169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1212223169 is about 34816.9954045435. The cubic root of 1212223169 is about 1066.2544583787.

The spelling of 1212223169 in words is "one billion, two hundred twelve million, two hundred twenty-three thousand, one hundred sixty-nine".