1211403331240 has 32 divisors (see below), whose sum is σ = 2725688976480. Its totient is φ = 484555735872.

The previous prime is 1211403331207. The next prime is 1211403331241. The reversal of 1211403331240 is 421333041121.

It is a super-3 number, since 3×1211403331240³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211403331241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6203167 + ... + 6395473.

It is an arithmetic number, because the mean of its divisors is an integer number (85177780515).

Almost surely, 2^{1211403331240} is an apocalyptic number.

1211403331240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211403331240 is an abundant number, since it is smaller than the sum of its proper divisors (1514285645240).

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

1211403331240 is a wasteful number, since it uses less digits than its factorization.

1211403331240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349801 (or 349797 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1211403331240 its reverse (421333041121), we get a palindrome (1632736372361).

The spelling of 1211403331240 in words is "one trillion, two hundred eleven billion, four hundred three million, three hundred thirty-one thousand, two hundred forty".