21213111301 has 8 divisors (see below), whose sum is σ = 22139092224. Its totient is φ = 20287436400.

The previous prime is 21213111289. The next prime is 21213111329. The reversal of 21213111301 is 10311131212.

It is a happy number.

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 21213111301 - 2²⁷ = 21078893573 is a prime.

It is a super-2 number, since 2×21213111301² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213111341) 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, 71251 + ... + 217951.

It is an arithmetic number, because the mean of its divisors is an integer number (2767386528).

Almost surely, 2^21213111301 is an apocalyptic number.

It is an amenable number.

21213111301 is a deficient number, since it is larger than the sum of its proper divisors (925980923).

21213111301 is a wasteful number, since it uses less digits than its factorization.

21213111301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153011.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21213111301 its reverse (10311131212), we get a palindrome (31524242513).

The spelling of 21213111301 in words is "twenty-one billion, two hundred thirteen million, one hundred eleven thousand, three hundred one".