1211012544340 has 48 divisors (see below), whose sum is σ = 2693169561600. Its totient is φ = 455834829312.

The previous prime is 1211012544293. The next prime is 1211012544349. The reversal of 1211012544340 is 434452101121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211012544299 and 1211012544308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012544349) 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, 1773901 + ... + 2359819.

It is an arithmetic number, because the mean of its divisors is an integer number (56107699200).

Almost surely, 2^{1211012544340} is an apocalyptic number.

1211012544340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211012544340 is an abundant number, since it is smaller than the sum of its proper divisors (1482157017260).

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

1211012544340 is a wasteful number, since it uses less digits than its factorization.

1211012544340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592024 (or 592022 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 1211012544340 its reverse (434452101121), we get a palindrome (1645464645461).

The spelling of 1211012544340 in words is "one trillion, two hundred eleven billion, twelve million, five hundred forty-four thousand, three hundred forty".