21101220111113 has 8 divisors (see below), whose sum is σ = 21401629337088. Its totient is φ = 20802648250944.

The previous prime is 21101220111107. The next prime is 21101220111121. The reversal of 21101220111113 is 31111102210112.

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 21101220111113 - 2²⁰ = 21101219062537 is a prime.

It is a super-2 number, since 2×21101220111113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101220111091 and 21101220111100.

It is not an unprimeable number, because it can be changed into a prime (21101220411113) 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, 459318320 + ... + 459364257.

It is an arithmetic number, because the mean of its divisors is an integer number (2675203667136).

Almost surely, 2^{21101220111113} is an apocalyptic number.

It is an amenable number.

21101220111113 is a deficient number, since it is larger than the sum of its proper divisors (300409225975).

21101220111113 is a wasteful number, since it uses less digits than its factorization.

21101220111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918682903.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 21101220111113 its reverse (31111102210112), we get a palindrome (52212322321225).

The spelling of 21101220111113 in words is "twenty-one trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand, one hundred thirteen".