1231001322000 has 320 divisors, whose sum is σ = 4080755148288. Its totient is φ = 319023360000.

The previous prime is 1231001321993. The next prime is 1231001322029. The reversal of 1231001322000 is 2231001321.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 63 ways as a sum of consecutive naturals, for example, 226659285 + ... + 226664715.

Almost surely, 2^{1231001322000} is an apocalyptic number.

1231001322000 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 1231001322000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2040377574144).

1231001322000 is an abundant number, since it is smaller than the sum of its proper divisors (2849753826288).

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

1231001322000 is a wasteful number, since it uses less digits than its factorization.

1231001322000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6515 (or 6499 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1231001322000 its reverse (2231001321), we get a palindrome (1233232323321).

The spelling of 1231001322000 in words is "one trillion, two hundred thirty-one billion, one million, three hundred twenty-two thousand".