21101001222010 has 64 divisors (see below), whose sum is σ = 38994880446720. Its totient is φ = 8218840215040.

The previous prime is 21101001221987. The next prime is 21101001222011. The reversal of 21101001222010 is 1022210010112.

It is not an unprimeable number, because it can be changed into a prime (21101001222011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18611601 + ... + 19712779.

It is an arithmetic number, because the mean of its divisors is an integer number (609295006980).

Almost surely, 2^{21101001222010} is an apocalyptic number.

21101001222010 is a deficient number, since it is larger than the sum of its proper divisors (17893879224710).

21101001222010 is a wasteful number, since it uses less digits than its factorization.

21101001222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101591.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21101001222010 its reverse (1022210010112), we get a palindrome (22123211232122).

The spelling of 21101001222010 in words is "twenty-one trillion, one hundred one billion, one million, two hundred twenty-two thousand, ten".