122021210212121 has 16 divisors (see below), whose sum is σ = 139041120965760. Its totient is φ = 106063419141120.

The previous prime is 122021210212117. The next prime is 122021210212123. The reversal of 122021210212121 is 121212012120221.

It is a cyclic number.

It is not a de Polignac number, because 122021210212121 - 2² = 122021210212117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122021210212093 and 122021210212102.

It is not an unprimeable number, because it can be changed into a prime (122021210212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1856819720 + ... + 1856885433.

It is an arithmetic number, because the mean of its divisors is an integer number (8690070060360).

Almost surely, 2^{122021210212121} is an apocalyptic number.

122021210212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122021210212121 is a deficient number, since it is larger than the sum of its proper divisors (17019910753639).

122021210212121 is a wasteful number, since it uses less digits than its factorization.

122021210212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713705296.

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

Adding to 122021210212121 its reverse (121212012120221), we get a palindrome (243233222332342).

The spelling of 122021210212121 in words is "one hundred twenty-two trillion, twenty-one billion, two hundred ten million, two hundred twelve thousand, one hundred twenty-one".