121020122121 has 32 divisors (see below), whose sum is σ = 171934796160. Its totient is φ = 75454239744.

The previous prime is 121020122081. The next prime is 121020122123. The reversal of 121020122121 is 121221020121.

It is not a de Polignac number, because 121020122121 - 2¹⁸ = 121019859977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121020122121.

It is not an unprimeable number, because it can be changed into a prime (121020122123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6098211 + ... + 6118023.

It is an arithmetic number, because the mean of its divisors is an integer number (5372962380).

Almost surely, 2^121020122121 is an apocalyptic number.

It is an amenable number.

121020122121 is a deficient number, since it is larger than the sum of its proper divisors (50914674039).

121020122121 is a wasteful number, since it uses less digits than its factorization.

121020122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20585.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121020122121 its reverse (121221020121), we get a palindrome (242241142242).

The spelling of 121020122121 in words is "one hundred twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".