1211204011413 has 32 divisors (see below), whose sum is σ = 1888996239360. Its totient is φ = 682137480960.

The previous prime is 1211204011411. The next prime is 1211204011417. The reversal of 1211204011413 is 3141104021121.

It is not a de Polignac number, because 1211204011413 - 2¹ = 1211204011411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211204011413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211204011411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13620295 + ... + 13708932.

It is an arithmetic number, because the mean of its divisors is an integer number (59031132480).

Almost surely, 2^{1211204011413} is an apocalyptic number.

It is an amenable number.

1211204011413 is a deficient number, since it is larger than the sum of its proper divisors (677792227947).

1211204011413 is a wasteful number, since it uses less digits than its factorization.

1211204011413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27329337.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 1211204011413 its reverse (3141104021121), we get a palindrome (4352308032534).

The spelling of 1211204011413 in words is "one trillion, two hundred eleven billion, two hundred four million, eleven thousand, four hundred thirteen".