122100211221 has 16 divisors (see below), whose sum is σ = 168065525760. Its totient is φ = 78767944560.

The previous prime is 122100211213. The next prime is 122100211249. The reversal of 122100211221 is 122112001221.

It is not a de Polignac number, because 122100211221 - 2³ = 122100211213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122100211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100211721) 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, 1278510 + ... + 1370688.

It is an arithmetic number, because the mean of its divisors is an integer number (10504095360).

Almost surely, 2^122100211221 is an apocalyptic number.

It is an amenable number.

122100211221 is a deficient number, since it is larger than the sum of its proper divisors (45965314539).

122100211221 is a wasteful number, since it uses less digits than its factorization.

122100211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106456.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122100211221 its reverse (122112001221), we get a palindrome (244212212442).

The spelling of 122100211221 in words is "one hundred twenty-two billion, one hundred million, two hundred eleven thousand, two hundred twenty-one".