121101202021 has 2 divisors, whose sum is σ = 121101202022. Its totient is φ = 121101202020.

The previous prime is 121101202003. The next prime is 121101202031. The reversal of 121101202021 is 120202101121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77676477025 + 43424724996 = 278705^2 + 208386^2 .

It is a cyclic number.

It is not a de Polignac number, because 121101202021 - 2⁹ = 121101201509 is a prime.

It is a super-2 number, since 2×121101202021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121101201992 and 121101202010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101202031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550601010 + 60550601011.

It is an arithmetic number, because the mean of its divisors is an integer number (60550601011).

Almost surely, 2^121101202021 is an apocalyptic number.

It is an amenable number.

121101202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101202021 is an equidigital number, since it uses as much as digits as its factorization.

121101202021 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 121101202021 its reverse (120202101121), we get a palindrome (241303303142).

The spelling of 121101202021 in words is "one hundred twenty-one billion, one hundred one million, two hundred two thousand, twenty-one".