20123121133000 has 64 divisors (see below), whose sum is σ = 47089358709120. Its totient is φ = 8049033880000.

The previous prime is 20123121132971. The next prime is 20123121133007. The reversal of 20123121133000 is 33112132102.

It is not an unprimeable number, because it can be changed into a prime (20123121133007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40335075 + ... + 40830925.

It is an arithmetic number, because the mean of its divisors is an integer number (735771229830).

Almost surely, 2^{20123121133000} is an apocalyptic number.

20123121133000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123121133000 is an abundant number, since it is smaller than the sum of its proper divisors (26966237576120).

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

20123121133000 is a wasteful number, since it uses less digits than its factorization.

20123121133000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536455 (or 536441 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20123121133000 its reverse (33112132102), we get a palindrome (20156233265102).

The spelling of 20123121133000 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred thirty-three thousand".