221101011010210 has 32 divisors (see below), whose sum is σ = 421393624233840. Its totient is φ = 83237808586752.

The previous prime is 221101011010207. The next prime is 221101011010211. The reversal of 221101011010210 is 12010110101122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 141197775032889 + 79903235977321 = 11882667^2 + 8938861^2 .

It is not an unprimeable number, because it can be changed into a prime (221101011010211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72503106 + ... + 75491074.

Almost surely, 2^{221101011010210} is an apocalyptic number.

221101011010210 is a deficient number, since it is larger than the sum of its proper divisors (200292613223630).

221101011010210 is a wasteful number, since it uses less digits than its factorization.

221101011010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423270.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221101011010210 its reverse (12010110101122), we get a palindrome (233111121111332).

The spelling of 221101011010210 in words is "two hundred twenty-one trillion, one hundred one billion, eleven million, ten thousand, two hundred ten".