221020101210 has 32 divisors (see below), whose sum is σ = 530464334400. Its totient is φ = 58936905728.

The previous prime is 221020101209. The next prime is 221020101223. The reversal of 221020101210 is 12101020122.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114141 + ... + 1297439.

It is an arithmetic number, because the mean of its divisors is an integer number (16577010450).

Almost surely, 2^221020101210 is an apocalyptic number.

221020101210 is an abundant number, since it is smaller than the sum of its proper divisors (309444233190).

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

221020101210 is a wasteful number, since it uses less digits than its factorization.

221020101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223502.

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

Adding to 221020101210 its reverse (12101020122), we get a palindrome (233121121332).

The spelling of 221020101210 in words is "two hundred twenty-one billion, twenty million, one hundred one thousand, two hundred ten".