21101204113 has 16 divisors (see below), whose sum is σ = 23316808320. Its totient is φ = 18936288000.

The previous prime is 21101204107. The next prime is 21101204171. The reversal of 21101204113 is 31140210112.

It is not a de Polignac number, because 21101204113 - 2¹⁷ = 21101073041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101204513) 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, 346228 + ... + 402586.

It is an arithmetic number, because the mean of its divisors is an integer number (1457300520).

Almost surely, 2^21101204113 is an apocalyptic number.

It is an amenable number.

21101204113 is a deficient number, since it is larger than the sum of its proper divisors (2215604207).

21101204113 is a wasteful number, since it uses less digits than its factorization.

21101204113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56808.

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

Adding to 21101204113 its reverse (31140210112), we get a palindrome (52241414225).

The spelling of 21101204113 in words is "twenty-one billion, one hundred one million, two hundred four thousand, one hundred thirteen".