1231455321000 has 96 divisors (see below), whose sum is σ = 4162319015400. Its totient is φ = 328388083200.

The previous prime is 1231455320999. The next prime is 1231455321007. The reversal of 1231455321000 is 1235541321.

1231455321000 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 4 + 553 + 2 + 100 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 256374119556 + 975081201444 = 506334^2 + 987462^2 .

It is not an unprimeable number, because it can be changed into a prime (1231455321007) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 68405185 + ... + 68423184.

Almost surely, 2^{1231455321000} is an apocalyptic number.

1231455321000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231455321000 is an abundant number, since it is smaller than the sum of its proper divisors (2930863694400).

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

1231455321000 is a wasteful number, since it uses less digits than its factorization.

1231455321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136828396 (or 136828379 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 1231455321000 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-five million, three hundred twenty-one thousand".