121421122242021 has 48 divisors (see below), whose sum is σ = 223401976387200. Its totient is φ = 61865162671104.

The previous prime is 121421122242011. The next prime is 121421122242037. The reversal of 121421122242021 is 120242221124121.

121421122242021 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 2 + 11 + 222 + 420 + 2 + 1 = 666.

It is not a de Polignac number, because 121421122242021 - 2⁶ = 121421122241957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121421122242011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2983446216 + ... + 2983486913.

It is an arithmetic number, because the mean of its divisors is an integer number (4654207841400).

Almost surely, 2^{121421122242021} is an apocalyptic number.

It is an amenable number.

121421122242021 is a deficient number, since it is larger than the sum of its proper divisors (101980854145179).

121421122242021 is a wasteful number, since it uses less digits than its factorization.

121421122242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966933178 (or 5966933175 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 121421122242021 its reverse (120242221124121), we get a palindrome (241663343366142).

The spelling of 121421122242021 in words is "one hundred twenty-one trillion, four hundred twenty-one billion, one hundred twenty-two million, two hundred forty-two thousand, twenty-one".