21212310101 has 16 divisors (see below), whose sum is σ = 22273574400. Its totient is φ = 20173574400.

The previous prime is 21212310037. The next prime is 21212310103. The reversal of 21212310101 is 10101321212.

It is a cyclic number.

It is not a de Polignac number, because 21212310101 - 2⁶ = 21212310037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212310103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2530445 + ... + 2538813.

It is an arithmetic number, because the mean of its divisors is an integer number (1392098400).

Almost surely, 2^21212310101 is an apocalyptic number.

It is an amenable number.

21212310101 is a deficient number, since it is larger than the sum of its proper divisors (1061264299).

21212310101 is a wasteful number, since it uses less digits than its factorization.

21212310101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9700.

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

Adding to 21212310101 its reverse (10101321212), we get a palindrome (31313631313).

The spelling of 21212310101 in words is "twenty-one billion, two hundred twelve million, three hundred ten thousand, one hundred one".