1031213230320 has 640 divisors, whose sum is σ = 4137143205888. Its totient is φ = 206513049600.

The previous prime is 1031213230319. The next prime is 1031213230357. The reversal of 1031213230320 is 230323121301.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 65796085 + ... + 65811755.

Almost surely, 2^{1031213230320} is an apocalyptic number.

1031213230320 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 1031213230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068571602944).

1031213230320 is an abundant number, since it is smaller than the sum of its proper divisors (3105929975568).

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

1031213230320 is a wasteful number, since it uses less digits than its factorization.

1031213230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15861 (or 15855 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1031213230320 its reverse (230323121301), we get a palindrome (1261536351621).

The spelling of 1031213230320 in words is "one trillion, thirty-one billion, two hundred thirteen million, two hundred thirty thousand, three hundred twenty".