221212222011002 has 8 divisors (see below), whose sum is σ = 351337058488116. Its totient is φ = 104099869181632.

The previous prime is 221212222010993. The next prime is 221212222011007. The reversal of 221212222011002 is 200110222212122.

It can be written as a sum of positive squares in 2 ways, for example, as 207116394788521 + 14095827222481 = 14391539^2 + 3754441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (221212222011007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3253120911893 + ... + 3253120911960.

Almost surely, 2^{221212222011002} is an apocalyptic number.

221212222011002 is a deficient number, since it is larger than the sum of its proper divisors (130124836477114).

221212222011002 is a wasteful number, since it uses less digits than its factorization.

221212222011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506241823872.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221212222011002 its reverse (200110222212122), we get a palindrome (421322444223124).

The spelling of 221212222011002 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, eleven thousand, two".