21213033113 has 8 divisors (see below), whose sum is σ = 22477389120. Its totient is φ = 19963465200.

The previous prime is 21213033097. The next prime is 21213033133. The reversal of 21213033113 is 31133031212.

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 21213033113 - 2⁴ = 21213033097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213033133) 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, 3694070 + ... + 3699807.

It is an arithmetic number, because the mean of its divisors is an integer number (2809673640).

Almost surely, 2^21213033113 is an apocalyptic number.

It is an amenable number.

21213033113 is a deficient number, since it is larger than the sum of its proper divisors (1264356007).

21213033113 is a wasteful number, since it uses less digits than its factorization.

21213033113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7394047.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21213033113 its reverse (31133031212), we get a palindrome (52346064325).

The spelling of 21213033113 in words is "twenty-one billion, two hundred thirteen million, thirty-three thousand, one hundred thirteen".