222121121121101 has 16 divisors (see below), whose sum is σ = 225175333814208. Its totient is φ = 219084103488000.

The previous prime is 222121121121077. The next prime is 222121121121113. The reversal of 222121121121101 is 101121121121222.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222121121121101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121121121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102310466 + ... + 104458956.

It is an arithmetic number, because the mean of its divisors is an integer number (14073458363388).

Almost surely, 2^{222121121121101} is an apocalyptic number.

It is an amenable number.

222121121121101 is a deficient number, since it is larger than the sum of its proper divisors (3054212693107).

222121121121101 is a wasteful number, since it uses less digits than its factorization.

222121121121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152492.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 222121121121101 its reverse (101121121121222), we get a palindrome (323242242242323).

It can be divided in two parts, 222121121121 and 101, that added together give a palindrome (222121121222).

The spelling of 222121121121101 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred one".