21202212102 has 8 divisors (see below), whose sum is σ = 42404424216. Its totient is φ = 7067404032.

The previous prime is 21202212071. The next prime is 21202212113. The reversal of 21202212102 is 20121220212.

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

21202212102 is an admirable number.

It is a super-3 number, since 3×21202212102³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1766851003 + ... + 1766851014.

It is an arithmetic number, because the mean of its divisors is an integer number (5300553027).

Almost surely, 2^21202212102 is an apocalyptic number.

21202212102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202212102 is a wasteful number, since it uses less digits than its factorization.

21202212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533702022.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21202212102 its reverse (20121220212), we get a palindrome (41323432314).

The spelling of 21202212102 in words is "twenty-one billion, two hundred two million, two hundred twelve thousand, one hundred two".