21211110222212 has 24 divisors (see below), whose sum is σ = 37306130438304. Its totient is φ = 10552346707712.

The previous prime is 21211110222209. The next prime is 21211110222227. The reversal of 21211110222212 is 21222201111212.

It is a super-2 number, since 2×21211110222212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15713453 + ... + 17009844.

It is an arithmetic number, because the mean of its divisors is an integer number (1554422101596).

Almost surely, 2^{21211110222212} is an apocalyptic number.

It is an amenable number.

21211110222212 is a deficient number, since it is larger than the sum of its proper divisors (16095020216092).

21211110222212 is a wasteful number, since it uses less digits than its factorization.

21211110222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32724115 (or 32724113 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21211110222212 its reverse (21222201111212), we get a palindrome (42433311333424).

The spelling of 21211110222212 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, two hundred twenty-two thousand, two hundred twelve".