1211412807 has 16 divisors (see below), whose sum is σ = 1957839360. Its totient is φ = 734189400.

The previous prime is 1211412799. The next prime is 1211412857. The reversal of 1211412807 is 7082141121.

It is not a de Polignac number, because 1211412807 - 2³ = 1211412799 is a prime.

It is a super-3 number, since 3×1211412807³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211412857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2039119 + ... + 2039712.

It is an arithmetic number, because the mean of its divisors is an integer number (122364960).

Almost surely, 2^1211412807 is an apocalyptic number.

1211412807 is a deficient number, since it is larger than the sum of its proper divisors (746426553).

1211412807 is a wasteful number, since it uses less digits than its factorization.

1211412807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078851 (or 4078845 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1211412807 is about 34805.3560102465. The cubic root of 1211412807 is about 1066.0168110745.

Adding to 1211412807 its reverse (7082141121), we get a palindrome (8293553928).

The spelling of 1211412807 in words is "one billion, two hundred eleven million, four hundred twelve thousand, eight hundred seven".