1211444313440 has 48 divisors (see below), whose sum is σ = 2876565372912. Its totient is φ = 482117927424.

The previous prime is 1211444313433. The next prime is 1211444313479. The reversal of 1211444313440 is 443134441121.

It is a super-3 number, since 3×1211444313440³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1211444313397 and 1211444313406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19185554 + ... + 19248593.

It is an arithmetic number, because the mean of its divisors is an integer number (59928445269).

Almost surely, 2^{1211444313440} is an apocalyptic number.

1211444313440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211444313440 is an abundant number, since it is smaller than the sum of its proper divisors (1665121059472).

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

1211444313440 is a wasteful number, since it uses less digits than its factorization.

1211444313440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38434359 (or 38434351 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 1211444313440 its reverse (443134441121), we get a palindrome (1654578754561).

The spelling of 1211444313440 in words is "one trillion, two hundred eleven billion, four hundred forty-four million, three hundred thirteen thousand, four hundred forty".