221212010013 has 16 divisors (see below), whose sum is σ = 295849881600. Its totient is φ = 147025088496.

The previous prime is 221212010003. The next prime is 221212010051. The reversal of 221212010013 is 310010212122.

It is not a de Polignac number, because 221212010013 - 2¹⁶ = 221211944477 is a prime.

It is a super-2 number, since 2×221212010013² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221212009974 and 221212010001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212010003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221756 + ... + 1391082.

It is an arithmetic number, because the mean of its divisors is an integer number (18490617600).

Almost surely, 2^221212010013 is an apocalyptic number.

It is an amenable number.

221212010013 is a deficient number, since it is larger than the sum of its proper divisors (74637871587).

221212010013 is a wasteful number, since it uses less digits than its factorization.

221212010013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170656.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221212010013 its reverse (310010212122), we get a palindrome (531222222135).

The spelling of 221212010013 in words is "two hundred twenty-one billion, two hundred twelve million, ten thousand, thirteen".