20120221010212 has 24 divisors (see below), whose sum is σ = 36141939002232. Its totient is φ = 9797218464000.

The previous prime is 20120221010209. The next prime is 20120221010257. The reversal of 20120221010212 is 21201012202102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7859690748196 + 12260530262016 = 2803514^2 + 3501504^2 .

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, 408192793 + ... + 408242080.

It is an arithmetic number, because the mean of its divisors is an integer number (1505914125093).

Almost surely, 2^{20120221010212} is an apocalyptic number.

It is an amenable number.

20120221010212 is a deficient number, since it is larger than the sum of its proper divisors (16021717992020).

20120221010212 is a wasteful number, since it uses less digits than its factorization.

20120221010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816435039 (or 816435037 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20120221010212 its reverse (21201012202102), we get a palindrome (41321233212314).

The spelling of 20120221010212 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, ten thousand, two hundred twelve".