121121050020541 has 4 divisors (see below), whose sum is σ = 121121107479900. Its totient is φ = 121120992561184.

The previous prime is 121121050020527. The next prime is 121121050020559. The reversal of 121121050020541 is 145020050121121.

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 63018924894916 + 58102125125625 = 7938446^2 + 7622475^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121050020541 - 2⁴³ = 112324956998333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121050020571) 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, 25442386 + ... + 29825443.

It is an arithmetic number, because the mean of its divisors is an integer number (30280276869975).

Almost surely, 2^{121121050020541} is an apocalyptic number.

It is an amenable number.

121121050020541 is a deficient number, since it is larger than the sum of its proper divisors (57459359).

121121050020541 is an equidigital number, since it uses as much as digits as its factorization.

121121050020541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57459358.

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 121121050020541 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, fifty million, twenty thousand, five hundred forty-one".