121001121022021 has 4 divisors (see below), whose sum is σ = 121001681332492. Its totient is φ = 121000560711552.

The previous prime is 121001121021973. The next prime is 121001121022037. The reversal of 121001121022021 is 120220121100121.

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 101018781656100 + 19982339365921 = 10050810^2 + 4470161^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001121022021 - 2³³ = 120992531087429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001121021986 and 121001121022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001121022051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279831180 + ... + 280263253.

It is an arithmetic number, because the mean of its divisors is an integer number (30250420333123).

Almost surely, 2^{121001121022021} is an apocalyptic number.

It is an amenable number.

121001121022021 is a deficient number, since it is larger than the sum of its proper divisors (560310471).

121001121022021 is an equidigital number, since it uses as much as digits as its factorization.

121001121022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560310470.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121001121022021 its reverse (120220121100121), we get a palindrome (241221242122142).

The spelling of 121001121022021 in words is "one hundred twenty-one trillion, one billion, one hundred twenty-one million, twenty-two thousand, twenty-one".