20121101003 has 4 divisors (see below), whose sum is σ = 20249261040. Its totient is φ = 19992940968.

The previous prime is 20121100991. The next prime is 20121101027. The reversal of 20121101003 is 30010112102.

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 20121101003 - 2¹² = 20121096907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121100003) 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, 64079783 + ... + 64080096.

It is an arithmetic number, because the mean of its divisors is an integer number (5062315260).

Almost surely, 2^20121101003 is an apocalyptic number.

20121101003 is a deficient number, since it is larger than the sum of its proper divisors (128160037).

20121101003 is a wasteful number, since it uses less digits than its factorization.

20121101003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128160036.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20121101003 its reverse (30010112102), we get a palindrome (50131213105).

The spelling of 20121101003 in words is "twenty billion, one hundred twenty-one million, one hundred one thousand, three".