210021121120001 has 4 divisors (see below), whose sum is σ = 210779320113492. Its totient is φ = 209262922126512.

The previous prime is 210021121119923. The next prime is 210021121120051. The reversal of 210021121120001 is 100021121120012.

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 20571222873601 + 189449898246400 = 4535551^2 + 13764080^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021121120001 - 2²⁶ = 210021054011137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021121120051) 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, 379099496330 + ... + 379099496883.

It is an arithmetic number, because the mean of its divisors is an integer number (52694830028373).

Almost surely, 2^{210021121120001} is an apocalyptic number.

It is an amenable number.

210021121120001 is a deficient number, since it is larger than the sum of its proper divisors (758198993491).

210021121120001 is an equidigital number, since it uses as much as digits as its factorization.

210021121120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758198993490.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210021121120001 its reverse (100021121120012), we get a palindrome (310042242240013).

The spelling of 210021121120001 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one".