101221320000 has 280 divisors, whose sum is σ = 335788463296. Its totient is φ = 26901504000.

The previous prime is 101221319989. The next prime is 101221320007. The reversal of 101221320000 is 23122101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221320007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40438749 + ... + 40441251.

Almost surely, 2^101221320000 is an apocalyptic number.

101221320000 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 101221320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167894231648).

101221320000 is an abundant number, since it is smaller than the sum of its proper divisors (234567143296).

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

101221320000 is an equidigital number, since it uses as much as digits as its factorization.

101221320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875 (or 2850 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 101221320000 its reverse (23122101), we get a palindrome (101244442101).

The spelling of 101221320000 in words is "one hundred one billion, two hundred twenty-one million, three hundred twenty thousand".