20123121133003 has 4 divisors (see below), whose sum is σ = 22997852723440. Its totient is φ = 17248389542568.

The previous prime is 20123121132971. The next prime is 20123121133007. The reversal of 20123121133003 is 30033112132102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20123121133003 - 2⁵ = 20123121132971 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 1437365795208 + ... + 1437365795221.

It is an arithmetic number, because the mean of its divisors is an integer number (5749463180860).

Almost surely, 2^{20123121133003} is an apocalyptic number.

20123121133003 is a deficient number, since it is larger than the sum of its proper divisors (2874731590437).

20123121133003 is an equidigital number, since it uses as much as digits as its factorization.

20123121133003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874731590436.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20123121133003 its reverse (30033112132102), we get a palindrome (50156233265105).

Subtracting 20123121133003 from its reverse (30033112132102), we obtain a palindrome (9909990999099).

The spelling of 20123121133003 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred thirty-three thousand, three".