121011000122021 has 4 divisors (see below), whose sum is σ = 121081808198700. Its totient is φ = 120940192045344.

The previous prime is 121011000122003. The next prime is 121011000122027. The reversal of 121011000122021 is 120221000110121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11149388464900 + 109861611657121 = 3339070^2 + 10481489^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011000122021 - 2⁴² = 116612953610917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011000121987 and 121011000122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011000122027) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 35404035776 + ... + 35404039193.

It is an arithmetic number, because the mean of its divisors is an integer number (30270452049675).

Almost surely, 2^{121011000122021} is an apocalyptic number.

It is an amenable number.

121011000122021 is a deficient number, since it is larger than the sum of its proper divisors (70808076679).

121011000122021 is an equidigital number, since it uses as much as digits as its factorization.

121011000122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70808076678.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121011000122021 its reverse (120221000110121), we get a palindrome (241232000232142).

The spelling of 121011000122021 in words is "one hundred twenty-one trillion, eleven billion, one hundred twenty-two thousand, twenty-one".