20110211212212 has 72 divisors (see below), whose sum is σ = 55511846470080. Its totient is φ = 6087803886720.

The previous prime is 20110211212207. The next prime is 20110211212219. The reversal of 20110211212212 is 21221211201102.

20110211212212 is a `hidden beast` number, since 20 + 1 + 10 + 211 + 212 + 212 = 666.

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 (20110211212219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25441537 + ... + 26220072.

It is an arithmetic number, because the mean of its divisors is an integer number (770997867640).

Almost surely, 2^{20110211212212} is an apocalyptic number.

20110211212212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20110211212212 is an abundant number, since it is smaller than the sum of its proper divisors (35401635257868).

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

20110211212212 is a wasteful number, since it uses less digits than its factorization.

20110211212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51662613 (or 51662608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20110211212212 its reverse (21221211201102), we get a palindrome (41331422413314).

The spelling of 20110211212212 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, two hundred twelve thousand, two hundred twelve".