21101131003 has 16 divisors (see below), whose sum is σ = 21902025600. Its totient is φ = 20305272960.

The previous prime is 21101130961. The next prime is 21101131013. The reversal of 21101131003 is 30013110112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101131003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101131013) 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, 20308558 + ... + 20309596.

It is an arithmetic number, because the mean of its divisors is an integer number (1368876600).

Almost surely, 2^21101131003 is an apocalyptic number.

21101131003 is a deficient number, since it is larger than the sum of its proper divisors (800894597).

21101131003 is a wasteful number, since it uses less digits than its factorization.

21101131003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21101131003 its reverse (30013110112), we get a palindrome (51114241115).

The spelling of 21101131003 in words is "twenty-one billion, one hundred one million, one hundred thirty-one thousand, three".