221211211020010 has 16 divisors (see below), whose sum is σ = 404707723768872. Its totient is φ = 87033919089600.

The previous prime is 221211211019951. The next prime is 221211211020013. The reversal of 221211211020010 is 10020112112122.

It can be written as a sum of positive squares in 4 ways, for example, as 166710628252609 + 54500582767401 = 12911647^2 + 7382451^2 .

It is not an unprimeable number, because it can be changed into a prime (221211211020013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181320664161 + ... + 181320665380.

Almost surely, 2^{221211211020010} is an apocalyptic number.

221211211020010 is a deficient number, since it is larger than the sum of its proper divisors (183496512748862).

221211211020010 is a wasteful number, since it uses less digits than its factorization.

221211211020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362641329609.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221211211020010 its reverse (10020112112122), we get a palindrome (231231323132132).

The spelling of 221211211020010 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred eleven million, twenty thousand, ten".