20122121210121 has 64 divisors (see below), whose sum is σ = 35865309849600. Its totient is φ = 10892268936000.

The previous prime is 20122121210071. The next prime is 20122121210131. The reversal of 20122121210121 is 12101212122102.

20122121210121 is a `hidden beast` number, since 201 + 221 + 2 + 121 + 0 + 121 = 666.

It is not a de Polignac number, because 20122121210121 - 2¹⁰ = 20122121209097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122121210094 and 20122121210103.

It is not an unprimeable number, because it can be changed into a prime (20122121210131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43945126 + ... + 44400656.

It is an arithmetic number, because the mean of its divisors is an integer number (560395466400).

Almost surely, 2^{20122121210121} is an apocalyptic number.

20122121210121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20122121210121 is a deficient number, since it is larger than the sum of its proper divisors (15743188639479).

20122121210121 is a wasteful number, since it uses less digits than its factorization.

20122121210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467867 (or 467861 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20122121210121 its reverse (12101212122102), we get a palindrome (32223333332223).

The spelling of 20122121210121 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".