121120022210021 has 4 divisors (see below), whose sum is σ = 121121425821612. Its totient is φ = 121118618598432.

The previous prime is 121120022210017. The next prime is 121120022210027. The reversal of 121120022210021 is 120012220021121.

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 19655478902500 + 101464543307521 = 4433450^2 + 10072961^2 .

It is a cyclic number.

It is not a de Polignac number, because 121120022210021 - 2² = 121120022210017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120022210027) 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, 701676350 + ... + 701848943.

It is an arithmetic number, because the mean of its divisors is an integer number (30280356455403).

Almost surely, 2^{121120022210021} is an apocalyptic number.

It is an amenable number.

121120022210021 is a deficient number, since it is larger than the sum of its proper divisors (1403611591).

121120022210021 is an equidigital number, since it uses as much as digits as its factorization.

121120022210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403611590.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121120022210021 its reverse (120012220021121), we get a palindrome (241132242231142).

The spelling of 121120022210021 in words is "one hundred twenty-one trillion, one hundred twenty billion, twenty-two million, two hundred ten thousand, twenty-one".