121121221020122 has 48 divisors (see below), whose sum is σ = 197790937393896. Its totient is φ = 55402778649600.

The previous prime is 121121221020103. The next prime is 121121221020131. The reversal of 121121221020122 is 221020122121121.

It can be written as a sum of positive squares in 4 ways, for example, as 81384196499761 + 39737024520361 = 9021319^2 + 6303731^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121121221020094 and 121121221020103.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101785208 + ... + 102968300.

Almost surely, 2^{121121221020122} is an apocalyptic number.

121121221020122 is a deficient number, since it is larger than the sum of its proper divisors (76669716373774).

121121221020122 is a wasteful number, since it uses less digits than its factorization.

121121221020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183695 (or 1183424 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121121221020122 its reverse (221020122121121), we get a palindrome (342141343141243).

The spelling of 121121221020122 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty thousand, one hundred twenty-two".