1212122469 has 4 divisors (see below), whose sum is σ = 1616163296. Its totient is φ = 808081644.

The previous prime is 1212122467. The next prime is 1212122473. The reversal of 1212122469 is 9642212121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9642212121 = 3 ⋅3214070707.

It is not a de Polignac number, because 1212122469 - 2¹ = 1212122467 is a prime.

It is a super-2 number, since 2×1212122469² = 2938481759709311922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202020409 + ... + 202020414.

It is an arithmetic number, because the mean of its divisors is an integer number (404040824).

Almost surely, 2^1212122469 is an apocalyptic number.

It is an amenable number.

1212122469 is a deficient number, since it is larger than the sum of its proper divisors (404040827).

1212122469 is an equidigital number, since it uses as much as digits as its factorization.

1212122469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404040826.

The product of its digits is 3456, while the sum is 30.

The square root of 1212122469 is about 34815.5492416822. The cubic root of 1212122469 is about 1066.2249327929.

The spelling of 1212122469 in words is "one billion, two hundred twelve million, one hundred twenty-two thousand, four hundred sixty-nine".