1231371398880 has 1152 divisors, whose sum is σ = 5123177579520. Its totient is φ = 263363788800.

The previous prime is 1231371398879. The next prime is 1231371398891. The reversal of 1231371398880 is 888931731321.

It is a happy number.

1231371398880 is a `hidden beast` number, since 1 + 231 + 371 + 39 + 8 + 8 + 8 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2048870580 + ... + 2048871180.

It is an arithmetic number, because the mean of its divisors is an integer number (4447202760).

Almost surely, 2^{1231371398880} is an apocalyptic number.

1231371398880 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 1231371398880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2561588789760).

1231371398880 is an abundant number, since it is smaller than the sum of its proper divisors (3891806180640).

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

1231371398880 is a wasteful number, since it uses less digits than its factorization.

1231371398880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 1231371398880 in words is "one trillion, two hundred thirty-one billion, three hundred seventy-one million, three hundred ninety-eight thousand, eight hundred eighty".