121021112211001 has 2 divisors, whose sum is σ = 121021112211002. Its totient is φ = 121021112211000.

The previous prime is 121021112210923. The next prime is 121021112211029. The reversal of 121021112211001 is 100112211120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75046962591225 + 45974149619776 = 8662965^2 + 6780424^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021112211001 - 2³⁵ = 120986752472633 is a prime.

It is a super-2 number, since 2×121021112211001² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121021112211301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510556105500 + 60510556105501.

It is an arithmetic number, because the mean of its divisors is an integer number (60510556105501).

Almost surely, 2^{121021112211001} is an apocalyptic number.

It is an amenable number.

121021112211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021112211001 is an equidigital number, since it uses as much as digits as its factorization.

121021112211001 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 16.

Adding to 121021112211001 its reverse (100112211120121), we get a palindrome (221133323331122).

The spelling of 121021112211001 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twelve million, two hundred eleven thousand, one".