121012121220021 has 12 divisors (see below), whose sum is σ = 174800534014080. Its totient is φ = 80672325415080.

The previous prime is 121012121219923. The next prime is 121012121220037. The reversal of 121012121220021 is 120022121210121.

121012121220021 is a `hidden beast` number, since 1 + 210 + 1 + 21 + 212 + 200 + 21 = 666.

It is not a de Polignac number, because 121012121220021 - 2⁷ = 121012121219893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121012121219976 and 121012121220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012121220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201522291 + ... + 202121888.

It is an arithmetic number, because the mean of its divisors is an integer number (14566711167840).

Almost surely, 2^{121012121220021} is an apocalyptic number.

It is an amenable number.

121012121220021 is a deficient number, since it is larger than the sum of its proper divisors (53788412794059).

121012121220021 is a wasteful number, since it uses less digits than its factorization.

121012121220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403677496 (or 403677493 counting only the distinct ones).

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

Adding to 121012121220021 its reverse (120022121210121), we get a palindrome (241034242430142).

The spelling of 121012121220021 in words is "one hundred twenty-one trillion, twelve billion, one hundred twenty-one million, two hundred twenty thousand, twenty-one".