221012120010 has 32 divisors (see below), whose sum is σ = 578649915072. Its totient is φ = 53578695680.

The previous prime is 221012120009. The next prime is 221012120011. The reversal of 221012120010 is 10021210122.

It is an interprime number because it is at equal distance from previous prime (221012120009) and next prime (221012120011).

It is not an unprimeable number, because it can be changed into a prime (221012120011) 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, 334866519 + ... + 334867178.

It is an arithmetic number, because the mean of its divisors is an integer number (18082809846).

Almost surely, 2^221012120010 is an apocalyptic number.

221012120010 is an abundant number, since it is smaller than the sum of its proper divisors (357637795062).

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

221012120010 is a wasteful number, since it uses less digits than its factorization.

221012120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669733718.

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

Adding to 221012120010 its reverse (10021210122), we get a palindrome (231033330132).

The spelling of 221012120010 in words is "two hundred twenty-one billion, twelve million, one hundred twenty thousand, ten".