1211023233240 has 64 divisors (see below), whose sum is σ = 3638252648160. Its totient is φ = 322478822400.

The previous prime is 1211023233223. The next prime is 1211023233307. The reversal of 1211023233240 is 423323201121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1211023233240.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7114069 + ... + 7282308.

Almost surely, 2^{1211023233240} is an apocalyptic number.

1211023233240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211023233240 is an abundant number, since it is smaller than the sum of its proper divisors (2427229414920).

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

1211023233240 is a wasteful number, since it uses less digits than its factorization.

1211023233240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14397092 (or 14397088 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1211023233240 its reverse (423323201121), we get a palindrome (1634346434361).

The spelling of 1211023233240 in words is "one trillion, two hundred eleven billion, twenty-three million, two hundred thirty-three thousand, two hundred forty".