20155121507003 has 12 divisors (see below), whose sum is σ = 23728232553480. Its totient is φ = 17067676040352.

The previous prime is 20155121506981. The next prime is 20155121507051. The reversal of 20155121507003 is 30070512155102.

It is not a de Polignac number, because 20155121507003 - 2¹⁸ = 20155121244859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20155121503003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2477881538 + ... + 2477889671.

It is an arithmetic number, because the mean of its divisors is an integer number (1977352712790).

Almost surely, 2^{20155121507003} is an apocalyptic number.

20155121507003 is a deficient number, since it is larger than the sum of its proper divisors (3573111046477).

20155121507003 is an equidigital number, since it uses as much as digits as its factorization.

20155121507003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955771306 (or 4955771299 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 20155121507003 in words is "twenty trillion, one hundred fifty-five billion, one hundred twenty-one million, five hundred seven thousand, three".