1212144404 has 24 divisors (see below), whose sum is σ = 2251684008. Its totient is φ = 568985600.

The previous prime is 1212144389. The next prime is 1212144433. The reversal of 1212144404 is 4044412121.

It can be written as a sum of positive squares in 4 ways, for example, as 515290000 + 696854404 = 22700^2 + 26398^2 .

It is a super-2 number, since 2×1212144404² = 2938588112297030432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212144404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5042 + ... + 49494.

It is an arithmetic number, because the mean of its divisors is an integer number (93820167).

Almost surely, 2^1212144404 is an apocalyptic number.

It is an amenable number.

1212144404 is a deficient number, since it is larger than the sum of its proper divisors (1039539604).

1212144404 is a wasteful number, since it uses less digits than its factorization.

1212144404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44875 (or 44873 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1212144404 is about 34815.8642575479. The cubic root of 1212144404 is about 1066.2313643496.

Adding to 1212144404 its reverse (4044412121), we get a palindrome (5256556525).

The spelling of 1212144404 in words is "one billion, two hundred twelve million, one hundred forty-four thousand, four hundred four".