221210000001012 has 384 divisors, whose sum is σ = 618730821434880. Its totient is φ = 60742656000000.

The previous prime is 221210000000923. The next prime is 221210000001037. The reversal of 221210000001012 is 210100000012122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17014838512 + ... + 17014851512.

It is an arithmetic number, because the mean of its divisors is an integer number (1611278180820).

Almost surely, 2^{221210000001012} is an apocalyptic number.

221210000001012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221210000001012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309365410717440).

221210000001012 is an abundant number, since it is smaller than the sum of its proper divisors (397520821433868).

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

221210000001012 is a wasteful number, since it uses less digits than its factorization.

221210000001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15203 (or 15201 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221210000001012 its reverse (210100000012122), we get a palindrome (431310000013134).

The spelling of 221210000001012 in words is "two hundred twenty-one trillion, two hundred ten billion, one thousand, twelve".