221211020010 has 32 divisors (see below), whose sum is σ = 530922913920. Its totient is φ = 58987775808.

The previous prime is 221211019979. The next prime is 221211020011. The reversal of 221211020010 is 10020112122.

It is not an unprimeable number, because it can be changed into a prime (221211020011) 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, 1070244 + ... + 1260096.

It is an arithmetic number, because the mean of its divisors is an integer number (16591341060).

Almost surely, 2^221211020010 is an apocalyptic number.

221211020010 is an abundant number, since it is smaller than the sum of its proper divisors (309711893910).

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

221211020010 is a wasteful number, since it uses less digits than its factorization.

221211020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228702.

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

Adding to 221211020010 its reverse (10020112122), we get a palindrome (231231132132).

The spelling of 221211020010 in words is "two hundred twenty-one billion, two hundred eleven million, twenty thousand, ten".