22201121121121 has 16 divisors (see below), whose sum is σ = 22946266783440. Its totient is φ = 21470189045760.

The previous prime is 22201121121119. The next prime is 22201121121191. The reversal of 22201121121121 is 12112112110222.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6022312321600 + 16178808799521 = 2454040^2 + 4022289^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201121121121 - 2¹ = 22201121121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22201121121191) 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, 9156276 + ... + 11324293.

It is an arithmetic number, because the mean of its divisors is an integer number (1434141673965).

Almost surely, 2^{22201121121121} is an apocalyptic number.

It is an amenable number.

22201121121121 is a deficient number, since it is larger than the sum of its proper divisors (745145662319).

22201121121121 is a wasteful number, since it uses less digits than its factorization.

22201121121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20480916.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22201121121121 its reverse (12112112110222), we get a palindrome (34313233231343).

The spelling of 22201121121121 in words is "twenty-two trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".