221212110001012 has 24 divisors (see below), whose sum is σ = 416903117399496. Its totient is φ = 102097071218688.

The previous prime is 221212110001009. The next prime is 221212110001039. The reversal of 221212110001012 is 210100011212122.

221212110001012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6568630688356 + 214643479312656 = 2562934^2 + 14650716^2 .

It is a super-2 number, since 2×221212110001012² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10687093 + ... + 23593180.

It is an arithmetic number, because the mean of its divisors is an integer number (17370963224979).

Almost surely, 2^{221212110001012} is an apocalyptic number.

It is an amenable number.

221212110001012 is a deficient number, since it is larger than the sum of its proper divisors (195691007398484).

221212110001012 is a wasteful number, since it uses less digits than its factorization.

221212110001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34404387 (or 34404385 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221212110001012 its reverse (210100011212122), we get a palindrome (431312121213134).

The spelling of 221212110001012 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred ten million, one thousand, twelve".