1231022001200 has 60 divisors (see below), whose sum is σ = 2958263252040. Its totient is φ = 492286778880.

The previous prime is 1231022001199. The next prime is 1231022001211. The reversal of 1231022001200 is 21002201321.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1243511 + ... + 2002089.

It is an arithmetic number, because the mean of its divisors is an integer number (49304387534).

Almost surely, 2^{1231022001200} is an apocalyptic number.

1231022001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231022001200 is an abundant number, since it is smaller than the sum of its proper divisors (1727241250840).

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

1231022001200 is a wasteful number, since it uses less digits than its factorization.

1231022001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762654 (or 762643 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1231022001200 its reverse (21002201321), we get a palindrome (1252024202521).

The spelling of 1231022001200 in words is "one trillion, two hundred thirty-one billion, twenty-two million, one thousand, two hundred".