121021101021 has 24 divisors (see below), whose sum is σ = 165301668864. Its totient is φ = 78756298240.

The previous prime is 121021101013. The next prime is 121021101043. The reversal of 121021101021 is 120101120121.

It is not a de Polignac number, because 121021101021 - 2³ = 121021101013 is a prime.

It is a super-2 number, since 2×121021101021² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121021100988 and 121021101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021109021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2514301 + ... + 2561981.

It is an arithmetic number, because the mean of its divisors is an integer number (6887569536).

Almost surely, 2^121021101021 is an apocalyptic number.

It is an amenable number.

121021101021 is a deficient number, since it is larger than the sum of its proper divisors (44280567843).

121021101021 is an equidigital number, since it uses as much as digits as its factorization.

121021101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48161 (or 48114 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121021101021 its reverse (120101120121), we get a palindrome (241122221142).

The spelling of 121021101021 in words is "one hundred twenty-one billion, twenty-one million, one hundred one thousand, twenty-one".