20120321123000 has 128 divisors (see below), whose sum is σ = 53879149209600. Its totient is φ = 6889208400000.

The previous prime is 20120321122997. The next prime is 20120321123029. The reversal of 20120321123000 is 32112302102.

It is a super-2 number, since 2×20120321123000² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20120321123000.

It is a congruent number.

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, 3343331 + ... + 7170669.

It is an arithmetic number, because the mean of its divisors is an integer number (420930853200).

Almost surely, 2^{20120321123000} is an apocalyptic number.

20120321123000 is a gapful number since it is divisible by the number (20) 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 20120321123000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26939574604800).

20120321123000 is an abundant number, since it is smaller than the sum of its proper divisors (33758828086600).

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

20120321123000 is a wasteful number, since it uses less digits than its factorization.

20120321123000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828118 (or 3828104 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20120321123000 its reverse (32112302102), we get a palindrome (20152433425102).

The spelling of 20120321123000 in words is "twenty trillion, one hundred twenty billion, three hundred twenty-one million, one hundred twenty-three thousand".