1211413340 has 48 divisors (see below), whose sum is σ = 2574633600. Its totient is φ = 478750272.

The previous prime is 1211413327. The next prime is 1211413349. The reversal of 1211413340 is 433141121.

It is a super-3 number, since 3×1211413340³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211413349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1409831 + ... + 1410689.

It is an arithmetic number, because the mean of its divisors is an integer number (53638200).

Almost surely, 2^1211413340 is an apocalyptic number.

1211413340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211413340 is an abundant number, since it is smaller than the sum of its proper divisors (1363220260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211413340 is a wasteful number, since it uses less digits than its factorization.

1211413340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1211413340 is about 34805.3636671131. The cubic root of 1211413340 is about 1066.0169674173.

Adding to 1211413340 its reverse (433141121), we get a palindrome (1644554461).

The spelling of 1211413340 in words is "one billion, two hundred eleven million, four hundred thirteen thousand, three hundred forty".