1264121213204 has 24 divisors (see below), whose sum is σ = 2242867363968. Its totient is φ = 623304676800.

The previous prime is 1264121213191. The next prime is 1264121213209. The reversal of 1264121213204 is 4023121214621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264121213209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1548149 + ... + 2219235.

It is an arithmetic number, because the mean of its divisors is an integer number (93452806832).

Almost surely, 2^{1264121213204} is an apocalyptic number.

It is an amenable number.

1264121213204 is a deficient number, since it is larger than the sum of its proper divisors (978746150764).

1264121213204 is a wasteful number, since it uses less digits than its factorization.

1264121213204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677615 (or 677613 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 1264121213204 its reverse (4023121214621), we get a palindrome (5287242427825).

The spelling of 1264121213204 in words is "one trillion, two hundred sixty-four billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred four".