121012012021 has 8 divisors (see below), whose sum is σ = 130346740224. Its totient is φ = 112016728560.

The previous prime is 121012011983. The next prime is 121012012031. The reversal of 121012012021 is 120210210121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121012012021 - 2⁷ = 121012011893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012011992 and 121012012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012012031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84860446 + ... + 84861871.

It is an arithmetic number, because the mean of its divisors is an integer number (16293342528).

Almost surely, 2^121012012021 is an apocalyptic number.

It is an amenable number.

121012012021 is a deficient number, since it is larger than the sum of its proper divisors (9334728203).

121012012021 is a wasteful number, since it uses less digits than its factorization.

121012012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169722371.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121012012021 its reverse (120210210121), we get a palindrome (241222222142).

The spelling of 121012012021 in words is "one hundred twenty-one billion, twelve million, twelve thousand, twenty-one".