221211012010 has 16 divisors (see below), whose sum is σ = 400481442216. Its totient is φ = 87972933568.

The previous prime is 221211011971. The next prime is 221211012031. The reversal of 221211012010 is 10210112122.

It can be written as a sum of positive squares in 4 ways, for example, as 220449969441 + 761042569 = 469521^2 + 27587^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63932089 + ... + 63935548.

Almost surely, 2^221211012010 is an apocalyptic number.

221211012010 is a deficient number, since it is larger than the sum of its proper divisors (179270430206).

221211012010 is a wasteful number, since it uses less digits than its factorization.

221211012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127867817.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221211012010 its reverse (10210112122), we get a palindrome (231421124132).

The spelling of 221211012010 in words is "two hundred twenty-one billion, two hundred eleven million, twelve thousand, ten".