121210221020021 has 8 divisors (see below), whose sum is σ = 138529822285824. Its totient is φ = 103891583605680.

The previous prime is 121210221019991. The next prime is 121210221020099. The reversal of 121210221020021 is 120020122012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121210221020021 - 2⁶ = 121210221019957 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 (121210221020221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240693365 + ... + 241196426.

It is an arithmetic number, because the mean of its divisors is an integer number (17316227785728).

Almost surely, 2^{121210221020021} is an apocalyptic number.

It is an amenable number.

121210221020021 is a deficient number, since it is larger than the sum of its proper divisors (17319601265803).

121210221020021 is an equidigital number, since it uses as much as digits as its factorization.

121210221020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481925731.

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

Adding to 121210221020021 its reverse (120020122012121), we get a palindrome (241230343032142).

The spelling of 121210221020021 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, twenty thousand, twenty-one".