212111020064 has 72 divisors (see below), whose sum is σ = 430412330880. Its totient is φ = 102894080256.

The previous prime is 212111020063. The next prime is 212111020067. The reversal of 212111020064 is 460020111212.

It is a happy number.

It is a super-2 number, since 2×212111020064² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212111020063) 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, 15720329 + ... + 15733815.

It is an arithmetic number, because the mean of its divisors is an integer number (5977949040).

Almost surely, 2^212111020064 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 212111020064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215206165440).

212111020064 is an abundant number, since it is smaller than the sum of its proper divisors (218301310816).

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

212111020064 is a wasteful number, since it uses less digits than its factorization.

212111020064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930 (or 13885 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212111020064 its reverse (460020111212), we get a palindrome (672131131276).

The spelling of 212111020064 in words is "two hundred twelve billion, one hundred eleven million, twenty thousand, sixty-four".