221022021121001 has 4 divisors (see below), whose sum is σ = 221022053043792. Its totient is φ = 221021989198212.

The previous prime is 221022021120997. The next prime is 221022021121087. The reversal of 221022021121001 is 100121120220122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221022021121001 - 2² = 221022021120997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022023121001) 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, 732755 + ... + 21037608.

It is an arithmetic number, because the mean of its divisors is an integer number (55255513260948).

Almost surely, 2^{221022021121001} is an apocalyptic number.

It is an amenable number.

221022021121001 is a deficient number, since it is larger than the sum of its proper divisors (31922791).

221022021121001 is a wasteful number, since it uses less digits than its factorization.

221022021121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31922790.

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

Adding to 221022021121001 its reverse (100121120220122), we get a palindrome (321143141341123).

The spelling of 221022021121001 in words is "two hundred twenty-one trillion, twenty-two billion, twenty-one million, one hundred twenty-one thousand, one".