1211422464 has 216 divisors, whose sum is σ = 4122273792. Its totient is φ = 334817280.

The previous prime is 1211422451. The next prime is 1211422483. The reversal of 1211422464 is 4642241121.

It is a super-3 number, since 3×1211422464³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 498757 + ... + 501179.

Almost surely, 2^1211422464 is an apocalyptic number.

1211422464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211422464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2061136896).

1211422464 is an abundant number, since it is smaller than the sum of its proper divisors (2910851328).

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

1211422464 is a wasteful number, since it uses less digits than its factorization.

1211422464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2466 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1211422464 is about 34805.4947386185. The cubic root of 1211422464 is about 1066.0196437167.

Adding to 1211422464 its reverse (4642241121), we get a palindrome (5853663585).

The spelling of 1211422464 in words is "one billion, two hundred eleven million, four hundred twenty-two thousand, four hundred sixty-four".