1233521212040 has 128 divisors (see below), whose sum is σ = 3086070865920. Its totient is φ = 440656588800.

The previous prime is 1233521212013. The next prime is 1233521212067. The reversal of 1233521212040 is 402121253321.

It is an interprime number because it is at equal distance from previous prime (1233521212013) and next prime (1233521212067).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104467817 + ... + 104479623.

It is an arithmetic number, because the mean of its divisors is an integer number (24109928640).

Almost surely, 2^{1233521212040} is an apocalyptic number.

1233521212040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1233521212040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543035432960).

1233521212040 is an abundant number, since it is smaller than the sum of its proper divisors (1852549653880).

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

1233521212040 is a wasteful number, since it uses less digits than its factorization.

1233521212040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18343 (or 18339 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1233521212040 its reverse (402121253321), we get a palindrome (1635642465361).

The spelling of 1233521212040 in words is "one trillion, two hundred thirty-three billion, five hundred twenty-one million, two hundred twelve thousand, forty".