221211101210 has 32 divisors (see below), whose sum is σ = 434420952192. Its totient is φ = 80432476480.

The previous prime is 221211101201. The next prime is 221211101297. The reversal of 221211101210 is 12101112122.

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, 1086947 + ... + 1274313.

It is an arithmetic number, because the mean of its divisors is an integer number (13575654756).

Almost surely, 2^221211101210 is an apocalyptic number.

221211101210 is a deficient number, since it is larger than the sum of its proper divisors (213209850982).

221211101210 is a wasteful number, since it uses less digits than its factorization.

221211101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198118.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221211101210 its reverse (12101112122), we get a palindrome (233312213332).

The spelling of 221211101210 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, two hundred ten".