21202212012212 has 48 divisors (see below), whose sum is σ = 46259891768832. Its totient is φ = 8260509206880.

The previous prime is 21202212012197. The next prime is 21202212012221. The reversal of 21202212012212 is 21221021220212.

It is a super-3 number, since 3×21202212012212³ (a number of 41 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 15 ways as a sum of consecutive naturals, for example, 31241363 + ... + 31912805.

It is an arithmetic number, because the mean of its divisors is an integer number (963747745184).

Almost surely, 2^{21202212012212} is an apocalyptic number.

21202212012212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202212012212 is an abundant number, since it is smaller than the sum of its proper divisors (25057679756620).

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

21202212012212 is a wasteful number, since it uses less digits than its factorization.

21202212012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773988 (or 773986 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202212012212 its reverse (21221021220212), we get a palindrome (42423233232424).

The spelling of 21202212012212 in words is "twenty-one trillion, two hundred two billion, two hundred twelve million, twelve thousand, two hundred twelve".