21121022004113 has 8 divisors (see below), whose sum is σ = 21153641238240. Its totient is φ = 21088408705920.

The previous prime is 21121022004107. The next prime is 21121022004157. The reversal of 21121022004113 is 31140022012112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121022004113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121022004193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5664398 + ... + 8621336.

It is an arithmetic number, because the mean of its divisors is an integer number (2644205154780).

Almost surely, 2^{21121022004113} is an apocalyptic number.

It is an amenable number.

21121022004113 is a deficient number, since it is larger than the sum of its proper divisors (32619234127).

21121022004113 is a wasteful number, since it uses less digits than its factorization.

21121022004113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967967.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21121022004113 its reverse (31140022012112), we get a palindrome (52261044016225).

The spelling of 21121022004113 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, four thousand, one hundred thirteen".