101221121221 has 16 divisors (see below), whose sum is σ = 110954562048. Its totient is φ = 91576601200.

The previous prime is 101221121213. The next prime is 101221121231. The reversal of 101221121221 is 122121122101.

It is a cyclic number.

It is not a de Polignac number, because 101221121221 - 2³ = 101221121213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101221121195 and 101221121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221121231) 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, 7511736 + ... + 7525198.

It is an arithmetic number, because the mean of its divisors is an integer number (6934660128).

Almost surely, 2^101221121221 is an apocalyptic number.

101221121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101221121221 is a deficient number, since it is larger than the sum of its proper divisors (9733440827).

101221121221 is a wasteful number, since it uses less digits than its factorization.

101221121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16712.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 101221121221 its reverse (122121122101), we get a palindrome (223342243322).

The spelling of 101221121221 in words is "one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".