20121131333203 has 4 divisors (see below), whose sum is σ = 20305728868480. Its totient is φ = 19936533797928.

The previous prime is 20121131333179. The next prime is 20121131333213. The reversal of 20121131333203 is 30233313112102.

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 20121131333203 - 2¹³ = 20121131325011 is a prime.

It is a super-2 number, since 2×20121131333203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121131333213) 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, 92298767475 + ... + 92298767692.

It is an arithmetic number, because the mean of its divisors is an integer number (5076432217120).

Almost surely, 2^{20121131333203} is an apocalyptic number.

20121131333203 is a deficient number, since it is larger than the sum of its proper divisors (184597535277).

20121131333203 is a wasteful number, since it uses less digits than its factorization.

20121131333203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184597535276.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20121131333203 its reverse (30233313112102), we get a palindrome (50354444445305).

The spelling of 20121131333203 in words is "twenty trillion, one hundred twenty-one billion, one hundred thirty-one million, three hundred thirty-three thousand, two hundred three".