201022111212 has 144 divisors (see below), whose sum is σ = 520286860800. Its totient is φ = 60353489664.

The previous prime is 201022111159. The next prime is 201022111253. The reversal of 201022111212 is 212111220102.

It is a super-2 number, since 2×201022111212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201022111191 and 201022111200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33262263 + ... + 33268305.

It is an arithmetic number, because the mean of its divisors is an integer number (3613103200).

Almost surely, 2^201022111212 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 201022111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260143430400).

201022111212 is an abundant number, since it is smaller than the sum of its proper divisors (319264749588).

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

201022111212 is a wasteful number, since it uses less digits than its factorization.

201022111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472 (or 6457 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201022111212 its reverse (212111220102), we get a palindrome (413133331314).

The spelling of 201022111212 in words is "two hundred one billion, twenty-two million, one hundred eleven thousand, two hundred twelve".