1231051524420 has 96 divisors (see below), whose sum is σ = 3468944368512. Its totient is φ = 326186155008.

The previous prime is 1231051524389. The next prime is 1231051524473. The reversal of 1231051524420 is 244251501321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47058064 + ... + 47084216.

It is an arithmetic number, because the mean of its divisors is an integer number (36134837172).

Almost surely, 2^{1231051524420} is an apocalyptic number.

1231051524420 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 1231051524420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734472184256).

1231051524420 is an abundant number, since it is smaller than the sum of its proper divisors (2237892844092).

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

1231051524420 is a wasteful number, since it uses less digits than its factorization.

1231051524420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31141 (or 31139 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 1231051524420 in words is "one trillion, two hundred thirty-one billion, fifty-one million, five hundred twenty-four thousand, four hundred twenty".