2122121012121 has 40 divisors (see below), whose sum is σ = 3458675708928. Its totient is φ = 1285983540000.

The previous prime is 2122121012117. The next prime is 2122121012131. The reversal of 2122121012121 is 1212101212212.

2122121012121 is a `hidden beast` number, since 21 + 221 + 210 + 1 + 212 + 1 = 666.

It is not a de Polignac number, because 2122121012121 - 2² = 2122121012117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122121012094 and 2122121012103.

It is not an unprimeable number, because it can be changed into a prime (2122121012101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7733571 + ... + 8003271.

Almost surely, 2^{2122121012121} is an apocalyptic number.

It is an amenable number.

2122121012121 is a deficient number, since it is larger than the sum of its proper divisors (1336554696807).

2122121012121 is a wasteful number, since it uses less digits than its factorization.

2122121012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278555 (or 278546 counting only the distinct ones).

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

Adding to 2122121012121 its reverse (1212101212212), we get a palindrome (3334222224333).

The spelling of 2122121012121 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, one hundred twenty-one".