1212023144 has 8 divisors (see below), whose sum is σ = 2272543410. Its totient is φ = 606011568.

The previous prime is 1212023123. The next prime is 1212023173. The reversal of 1212023144 is 4413202121.

It can be written as a sum of positive squares in only one way, i.e., 1111422244 + 100600900 = 33338^2 + 10030^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75751439 + ... + 75751454.

Almost surely, 2^1212023144 is an apocalyptic number.

It is an amenable number.

1212023144 is a deficient number, since it is larger than the sum of its proper divisors (1060520266).

1212023144 is a wasteful number, since it uses less digits than its factorization.

1212023144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151502899 (or 151502895 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1212023144 is about 34814.1227664866. The cubic root of 1212023144 is about 1066.1958087600.

Adding to 1212023144 its reverse (4413202121), we get a palindrome (5625225265).

The spelling of 1212023144 in words is "one billion, two hundred twelve million, twenty-three thousand, one hundred forty-four".