20210120011003 has 16 divisors (see below), whose sum is σ = 21795549071296. Its totient is φ = 18629094199680.

The previous prime is 20210120010961. The next prime is 20210120011019. The reversal of 20210120011003 is 30011002101202.

It is a cyclic number.

It is not a de Polignac number, because 20210120011003 - 2⁴¹ = 18011096755451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20210120051003) 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, 245016058 + ... + 245098528.

It is an arithmetic number, because the mean of its divisors is an integer number (1362221816956).

Almost surely, 2^{20210120011003} is an apocalyptic number.

20210120011003 is a deficient number, since it is larger than the sum of its proper divisors (1585429060293).

20210120011003 is a wasteful number, since it uses less digits than its factorization.

20210120011003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108934.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20210120011003 its reverse (30011002101202), we get a palindrome (50221122112205).

The spelling of 20210120011003 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, eleven thousand, three".