1211442123004 has 24 divisors (see below), whose sum is σ = 2177391086640. Its totient is φ = 589435117824.

The previous prime is 1211442122999. The next prime is 1211442123013. The reversal of 1211442123004 is 4003212441121.

It is a super-3 number, since 3×1211442123004³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211442123004.

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, 13045309 + ... + 13137844.

It is an arithmetic number, because the mean of its divisors is an integer number (90724628610).

Almost surely, 2^{1211442123004} is an apocalyptic number.

It is an amenable number.

1211442123004 is a deficient number, since it is larger than the sum of its proper divisors (965948963636).

1211442123004 is a wasteful number, since it uses less digits than its factorization.

1211442123004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26183469 (or 26183467 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1211442123004 its reverse (4003212441121), we get a palindrome (5214654564125).

The spelling of 1211442123004 in words is "one trillion, two hundred eleven billion, four hundred forty-two million, one hundred twenty-three thousand, four".