21211212310 has 8 divisors (see below), whose sum is σ = 38180182176. Its totient is φ = 8484484920.

The previous prime is 21211212287. The next prime is 21211212313. The reversal of 21211212310 is 1321211212.

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

It is a super-2 number, since 2×21211212310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211212313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060560606 + ... + 1060560625.

It is an arithmetic number, because the mean of its divisors is an integer number (4772522772).

Almost surely, 2^21211212310 is an apocalyptic number.

21211212310 is a deficient number, since it is larger than the sum of its proper divisors (16968969866).

21211212310 is a wasteful number, since it uses less digits than its factorization.

21211212310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121121238.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211212310 its reverse (1321211212), we get a palindrome (22532423522).

It can be divided in two parts, 212112 and 12310, that added together give a palindrome (224422).

The spelling of 21211212310 in words is "twenty-one billion, two hundred eleven million, two hundred twelve thousand, three hundred ten".