221022021210121 has 4 divisors (see below), whose sum is σ = 221083026463872. Its totient is φ = 220961015956372.

The previous prime is 221022021210101. The next prime is 221022021210131. The reversal of 221022021210121 is 121012120220122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221022021210121 - 2¹³ = 221022021201929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022021210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30502621441 + ... + 30502628686.

It is an arithmetic number, because the mean of its divisors is an integer number (55270756615968).

Almost surely, 2^{221022021210121} is an apocalyptic number.

It is an amenable number.

221022021210121 is a deficient number, since it is larger than the sum of its proper divisors (61005253751).

221022021210121 is an equidigital number, since it uses as much as digits as its factorization.

221022021210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61005253750.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221022021210121 its reverse (121012120220122), we get a palindrome (342034141430243).

The spelling of 221022021210121 in words is "two hundred twenty-one trillion, twenty-two billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".