201021111202212 has 216 divisors, whose sum is σ = 603808235581824. Its totient is φ = 56200122405504.

The previous prime is 201021111202189. The next prime is 201021111202217. The reversal of 201021111202212 is 212202111120102.

201021111202212 is a `hidden beast` number, since 20 + 10 + 211 + 11 + 202 + 212 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (201021111202217) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 376716058 + ... + 377249294.

It is an arithmetic number, because the mean of its divisors is an integer number (2795408498064).

Almost surely, 2^{201021111202212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201021111202212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301904117790912).

201021111202212 is an abundant number, since it is smaller than the sum of its proper divisors (402787124379612).

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

201021111202212 is a wasteful number, since it uses less digits than its factorization.

201021111202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537855 (or 537843 counting only the distinct ones).

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

Adding to 201021111202212 its reverse (212202111120102), we get a palindrome (413223222322314).

The spelling of 201021111202212 in words is "two hundred one trillion, twenty-one billion, one hundred eleven million, two hundred two thousand, two hundred twelve".