221012010212 has 48 divisors (see below), whose sum is σ = 460641753600. Its totient is φ = 92704098816.

The previous prime is 221012010209. The next prime is 221012010217. The reversal of 221012010212 is 212010210122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (221012010217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1649213 + ... + 1778180.

It is an arithmetic number, because the mean of its divisors is an integer number (9596703200).

Almost surely, 2^221012010212 is an apocalyptic number.

It is an amenable number.

221012010212 is an abundant number, since it is smaller than the sum of its proper divisors (239629743388).

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

221012010212 is a wasteful number, since it uses less digits than its factorization.

221012010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427465 (or 3427449 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221012010212 its reverse (212010210122), we get a palindrome (433022220334).

The spelling of 221012010212 in words is "two hundred twenty-one billion, twelve million, ten thousand, two hundred twelve".