22220000020121 has 8 divisors (see below), whose sum is σ = 23528563317864. Its totient is φ = 20911603886080.

The previous prime is 22220000020091. The next prime is 22220000020151. The reversal of 22220000020121 is 12102000002222.

It is an interprime number because it is at equal distance from previous prime (22220000020091) and next prime (22220000020151).

It can be written as a sum of positive squares in 4 ways, for example, as 7889694499600 + 14330305520521 = 2808860^2 + 3785539^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-22220000020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220000020096 and 22220000020105.

It is not an unprimeable number, because it can be changed into a prime (22220000020151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41517200 + ... + 42048993.

It is an arithmetic number, because the mean of its divisors is an integer number (2941070414733).

Almost surely, 2^{22220000020121} is an apocalyptic number.

It is an amenable number.

22220000020121 is a deficient number, since it is larger than the sum of its proper divisors (1308563297743).

22220000020121 is a wasteful number, since it uses less digits than its factorization.

22220000020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83581851.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22220000020121 its reverse (12102000002222), we get a palindrome (34322000022343).

The spelling of 22220000020121 in words is "twenty-two trillion, two hundred twenty billion, twenty thousand, one hundred twenty-one".