121021021020123 has 96 divisors (see below), whose sum is σ = 216740581529472. Its totient is φ = 63485175398400.

The previous prime is 121021021020121. The next prime is 121021021020127. The reversal of 121021021020123 is 321020120120121.

121021021020123 is a `hidden beast` number, since 1 + 21 + 0 + 210 + 210 + 201 + 23 = 666.

It is not a de Polignac number, because 121021021020123 - 2¹ = 121021021020121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121021021020096 and 121021021020105.

It is not an unprimeable number, because it can be changed into a prime (121021021020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 196457665 + ... + 197072717.

It is an arithmetic number, because the mean of its divisors is an integer number (2257714390932).

Almost surely, 2^{121021021020123} is an apocalyptic number.

121021021020123 is a deficient number, since it is larger than the sum of its proper divisors (95719560509349).

121021021020123 is a wasteful number, since it uses less digits than its factorization.

121021021020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619605 (or 619602 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121021021020123 its reverse (321020120120121), we get a palindrome (442041141140244).

The spelling of 121021021020123 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, twenty thousand, one hundred twenty-three".