20120221120212 has 36 divisors (see below), whose sum is σ = 53851180058676. Its totient is φ = 6312226233600.

The previous prime is 20120221120211. The next prime is 20120221120231. The reversal of 20120221120212 is 21202112202102.

It is a happy number.

20120221120212 is a `hidden beast` number, since 20 + 1 + 202 + 211 + 20 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5566560734736 + 14553660385476 = 2359356^2 + 3814926^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120221120211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16438088539 + ... + 16438089762.

It is an arithmetic number, because the mean of its divisors is an integer number (1495866112741).

Almost surely, 2^{20120221120212} is an apocalyptic number.

It is an amenable number.

20120221120212 is an abundant number, since it is smaller than the sum of its proper divisors (33730958938464).

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

20120221120212 is a wasteful number, since it uses less digits than its factorization.

20120221120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32876178328 (or 32876178323 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20120221120212 its reverse (21202112202102), we get a palindrome (41322333322314).

The spelling of 20120221120212 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twelve".