121011202021 has 2 divisors, whose sum is σ = 121011202022. Its totient is φ = 121011202020.

The previous prime is 121011201977. The next prime is 121011202033. The reversal of 121011202021 is 120202110121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67875880900 + 53135321121 = 260530^2 + 230511^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011202021 - 2⁷ = 121011201893 is a prime.

It is a super-2 number, since 2×121011202021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121011201992 and 121011202010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121011202721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505601010 + 60505601011.

It is an arithmetic number, because the mean of its divisors is an integer number (60505601011).

Almost surely, 2^121011202021 is an apocalyptic number.

It is an amenable number.

121011202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011202021 is an equidigital number, since it uses as much as digits as its factorization.

121011202021 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 121011202021 its reverse (120202110121), we get a palindrome (241213312142).

The spelling of 121011202021 in words is "one hundred twenty-one billion, eleven million, two hundred two thousand, twenty-one".