211121202001 has 2 divisors, whose sum is σ = 211121202002. Its totient is φ = 211121202000.

The previous prime is 211121201897. The next prime is 211121202011. The reversal of 211121202001 is 100202121112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203495721025 + 7625480976 = 451105^2 + 87324^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121202001 - 2¹³ = 211121193809 is a prime.

It is not a weakly prime, because it can be changed into another prime (211121202011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560601000 + 105560601001.

It is an arithmetic number, because the mean of its divisors is an integer number (105560601001).

Almost surely, 2^211121202001 is an apocalyptic number.

It is an amenable number.

211121202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121202001 is an equidigital number, since it uses as much as digits as its factorization.

211121202001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211121202001 its reverse (100202121112), we get a palindrome (311323323113).

The spelling of 211121202001 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred two thousand, one".