20021012111203 has 4 divisors (see below), whose sum is σ = 21074749590760. Its totient is φ = 18967274631648.

The previous prime is 20021012111197. The next prime is 20021012111249. The reversal of 20021012111203 is 30211121012002.

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

It is not a de Polignac number, because 20021012111203 - 2⁹ = 20021012110691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021012111003) 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, 526868739750 + ... + 526868739787.

It is an arithmetic number, because the mean of its divisors is an integer number (5268687397690).

Almost surely, 2^{20021012111203} is an apocalyptic number.

20021012111203 is a deficient number, since it is larger than the sum of its proper divisors (1053737479557).

20021012111203 is a wasteful number, since it uses less digits than its factorization.

20021012111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053737479556.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20021012111203 its reverse (30211121012002), we get a palindrome (50232133123205).

The spelling of 20021012111203 in words is "twenty trillion, twenty-one billion, twelve million, one hundred eleven thousand, two hundred three".