201000022021081 has 2 divisors, whose sum is σ = 201000022021082. Its totient is φ = 201000022021080.

The previous prime is 201000022021009. The next prime is 201000022021157. The reversal of 201000022021081 is 180120220000102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138455017089481 + 62545004931600 = 11766691^2 + 7908540^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000022021081 - 2¹⁹ = 201000021496793 is a prime.

It is a super-2 number, since 2×201000022021081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201000022022081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500011010540 + 100500011010541.

It is an arithmetic number, because the mean of its divisors is an integer number (100500011010541).

Almost surely, 2^{201000022021081} is an apocalyptic number.

It is an amenable number.

201000022021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000022021081 is an equidigital number, since it uses as much as digits as its factorization.

201000022021081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201000022021081 its reverse (180120220000102), we get a palindrome (381120242021183).

The spelling of 201000022021081 in words is "two hundred one trillion, twenty-two million, twenty-one thousand, eighty-one".