201121201222001 has 2 divisors, whose sum is σ = 201121201222002. Its totient is φ = 201121201222000.

The previous prime is 201121201221961. The next prime is 201121201222043. The reversal of 201121201222001 is 100222102121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198805036830976 + 2316164391025 = 14099824^2 + 1521895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121201222001 is a prime.

It is not a weakly prime, because it can be changed into another prime (201121201252001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560600611000 + 100560600611001.

It is an arithmetic number, because the mean of its divisors is an integer number (100560600611001).

Almost surely, 2^{201121201222001} is an apocalyptic number.

It is an amenable number.

201121201222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121201222001 is an equidigital number, since it uses as much as digits as its factorization.

201121201222001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201121201222001 its reverse (100222102121102), we get a palindrome (301343303343103).

The spelling of 201121201222001 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, one".