31232223120000 has 640 divisors, whose sum is σ = 118939852563840. Its totient is φ = 7110918144000.

The previous prime is 31232223119963. The next prime is 31232223120029. The reversal of 31232223120000 is 2132223213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×31232223120000² (a number of 28 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 431723832 + ... + 431796168.

It is an arithmetic number, because the mean of its divisors is an integer number (185843519631).

Almost surely, 2^{31232223120000} is an apocalyptic number.

31232223120000 is a gapful number since it is divisible by the number (30) 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 31232223120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59469926281920).

31232223120000 is an abundant number, since it is smaller than the sum of its proper divisors (87707629443840).

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

31232223120000 is an equidigital number, since it uses as much as digits as its factorization.

31232223120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72638 (or 72611 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31232223120000 its reverse (2132223213), we get a palindrome (31234355343213).

The spelling of 31232223120000 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twenty-three million, one hundred twenty thousand".