222121020220201 has 4 divisors (see below), whose sum is σ = 223611765322500. Its totient is φ = 220630275117904.

The previous prime is 222121020220193. The next prime is 222121020220217. The reversal of 222121020220201 is 102022020121222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17249776291225 + 204871243928976 = 4153285^2 + 14313324^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121020220201 - 2³ = 222121020220193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121020220261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745372550926 + ... + 745372551223.

It is an arithmetic number, because the mean of its divisors is an integer number (55902941330625).

Almost surely, 2^{222121020220201} is an apocalyptic number.

It is an amenable number.

222121020220201 is a deficient number, since it is larger than the sum of its proper divisors (1490745102299).

222121020220201 is a wasteful number, since it uses less digits than its factorization.

222121020220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490745102298.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222121020220201 its reverse (102022020121222), we get a palindrome (324143040341423).

The spelling of 222121020220201 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, twenty million, two hundred twenty thousand, two hundred one".