1211330242420 has 12 divisors (see below), whose sum is σ = 2543793509124. Its totient is φ = 484532096960.

The previous prime is 1211330242387. The next prime is 1211330242459. The reversal of 1211330242420 is 242420331121.

It can be written as a sum of positive squares in 2 ways, for example, as 762467761636 + 448862480784 = 873194^2 + 669972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30283256041 + ... + 30283256080.

It is an arithmetic number, because the mean of its divisors is an integer number (211982792427).

Almost surely, 2^{1211330242420} is an apocalyptic number.

1211330242420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211330242420 is an abundant number, since it is smaller than the sum of its proper divisors (1332463266704).

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

1211330242420 is a wasteful number, since it uses less digits than its factorization.

1211330242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60566512130 (or 60566512128 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1211330242420 its reverse (242420331121), we get a palindrome (1453750573541).

The spelling of 1211330242420 in words is "one trillion, two hundred eleven billion, three hundred thirty million, two hundred forty-two thousand, four hundred twenty".