21220001010212 has 24 divisors (see below), whose sum is σ = 38072676789504. Its totient is φ = 10343850125312.

The previous prime is 21220001010211. The next prime is 21220001010253. The reversal of 21220001010212 is 21201010002212.

It is not an unprimeable number, because it can be changed into a prime (21220001010211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219547688 + ... + 219644319.

It is an arithmetic number, because the mean of its divisors is an integer number (1586361532896).

Almost surely, 2^{21220001010212} is an apocalyptic number.

It is an amenable number.

21220001010212 is a deficient number, since it is larger than the sum of its proper divisors (16852675779292).

21220001010212 is a wasteful number, since it uses less digits than its factorization.

21220001010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439192315 (or 439192313 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220001010212 its reverse (21201010002212), we get a palindrome (42421011012424).

The spelling of 21220001010212 in words is "twenty-one trillion, two hundred twenty billion, one million, ten thousand, two hundred twelve".