1211322312140 has 12 divisors (see below), whose sum is σ = 2543776855536. Its totient is φ = 484528924848.

The previous prime is 1211322312131. The next prime is 1211322312143. The reversal of 1211322312140 is 412132231121.

It is not an unprimeable number, because it can be changed into a prime (1211322312143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30283057784 + ... + 30283057823.

It is an arithmetic number, because the mean of its divisors is an integer number (211981404628).

Almost surely, 2^{1211322312140} is an apocalyptic number.

1211322312140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211322312140 is an abundant number, since it is smaller than the sum of its proper divisors (1332454543396).

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

1211322312140 is a wasteful number, since it uses less digits than its factorization.

1211322312140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60566115616 (or 60566115614 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1211322312140 its reverse (412132231121), we get a palindrome (1623454543261).

The spelling of 1211322312140 in words is "one trillion, two hundred eleven billion, three hundred twenty-two million, three hundred twelve thousand, one hundred forty".