121001022201001 has 2 divisors, whose sum is σ = 121001022201002. Its totient is φ = 121001022201000.

The previous prime is 121001022200963. The next prime is 121001022201011. The reversal of 121001022201001 is 100102220100121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84660609254400 + 36340412946601 = 9201120^2 + 6028301^2 .

It is an emirp because it is prime and its reverse (100102220100121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121001022201001 - 2¹⁵ = 121001022168233 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001022201011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500511100500 + 60500511100501.

It is an arithmetic number, because the mean of its divisors is an integer number (60500511100501).

Almost surely, 2^{121001022201001} is an apocalyptic number.

It is an amenable number.

121001022201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001022201001 is an equidigital number, since it uses as much as digits as its factorization.

121001022201001 is an odious number, because the sum of its binary digits is odd.

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

Adding to 121001022201001 its reverse (100102220100121), we get a palindrome (221103242301122).

The spelling of 121001022201001 in words is "one hundred twenty-one trillion, one billion, twenty-two million, two hundred one thousand, one".