21021102113 has 8 divisors (see below), whose sum is σ = 22960467360. Its totient is φ = 19086462880.

The previous prime is 21021102107. The next prime is 21021102209. The reversal of 21021102113 is 31120112012.

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

It is a cyclic number.

It is not a de Polignac number, because 21021102113 - 2²² = 21016907809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21021102013) 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, 1172195 + ... + 1189992.

It is an arithmetic number, because the mean of its divisors is an integer number (2870058420).

Almost surely, 2^21021102113 is an apocalyptic number.

It is an amenable number.

21021102113 is a deficient number, since it is larger than the sum of its proper divisors (1939365247).

21021102113 is a wasteful number, since it uses less digits than its factorization.

21021102113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363007.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21021102113 its reverse (31120112012), we get a palindrome (52141214125).

The spelling of 21021102113 in words is "twenty-one billion, twenty-one million, one hundred two thousand, one hundred thirteen".