101221216522 has 8 divisors (see below), whose sum is σ = 154696576356. Its totient is φ = 49655691072.

The previous prime is 101221216513. The next prime is 101221216543. The reversal of 101221216522 is 225612122101.

It can be written as a sum of positive squares in 2 ways, for example, as 95820583401 + 5400633121 = 309549^2 + 73489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477458463 + ... + 477458674.

Almost surely, 2^101221216522 is an apocalyptic number.

101221216522 is a deficient number, since it is larger than the sum of its proper divisors (53475359834).

101221216522 is an equidigital number, since it uses as much as digits as its factorization.

101221216522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954917192.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 101221216522 its reverse (225612122101), we get a palindrome (326833338623).

The spelling of 101221216522 in words is "one hundred one billion, two hundred twenty-one million, two hundred sixteen thousand, five hundred twenty-two".