121102212001021 has 4 divisors (see below), whose sum is σ = 121621963984092. Its totient is φ = 120582460017952.

The previous prime is 121102212000937. The next prime is 121102212001039. The reversal of 121102212001021 is 120100212201121.

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 16264169488996 + 104838042512025 = 4032886^2 + 10239045^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102212001021 - 2⁷ = 121102212000893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121102212000986 and 121102212001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121142212001021) 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, 259875991186 + ... + 259875991651.

It is an arithmetic number, because the mean of its divisors is an integer number (30405490996023).

Almost surely, 2^{121102212001021} is an apocalyptic number.

It is an amenable number.

121102212001021 is a deficient number, since it is larger than the sum of its proper divisors (519751983071).

121102212001021 is an equidigital number, since it uses as much as digits as its factorization.

121102212001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519751983070.

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

Adding to 121102212001021 its reverse (120100212201121), we get a palindrome (241202424202142).

The spelling of 121102212001021 in words is "one hundred twenty-one trillion, one hundred two billion, two hundred twelve million, one thousand, twenty-one".