121011012021 has 8 divisors (see below), whose sum is σ = 163620523584. Its totient is φ = 79537754240.

The previous prime is 121011012019. The next prime is 121011012037. The reversal of 121011012021 is 120210110121.

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 121011012021 - 2¹ = 121011012019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121011011988 and 121011012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011012071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284063196 + ... + 284063621.

It is an arithmetic number, because the mean of its divisors is an integer number (20452565448).

Almost surely, 2^121011012021 is an apocalyptic number.

It is an amenable number.

121011012021 is a deficient number, since it is larger than the sum of its proper divisors (42609511563).

121011012021 is an equidigital number, since it uses as much as digits as its factorization.

121011012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568126891.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121011012021 its reverse (120210110121), we get a palindrome (241221122142).

The spelling of 121011012021 in words is "one hundred twenty-one billion, eleven million, twelve thousand, twenty-one".