2121100121122 has 4 divisors (see below), whose sum is σ = 3181650181686. Its totient is φ = 1060550060560.

The previous prime is 2121100121083. The next prime is 2121100121183. The reversal of 2121100121122 is 2211210011212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1444200659001 + 676899462121 = 1201749^2 + 822739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121100121096 and 2121100121105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530275030279 + ... + 530275030282.

Almost surely, 2^{2121100121122} is an apocalyptic number.

2121100121122 is a deficient number, since it is larger than the sum of its proper divisors (1060550060564).

2121100121122 is a wasteful number, since it uses less digits than its factorization.

2121100121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060550060563.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2121100121122 its reverse (2211210011212), we get a palindrome (4332310132334).

The spelling of 2121100121122 in words is "two trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, one hundred twenty-two".