221102121001201 has 4 divisors (see below), whose sum is σ = 241202313819504. Its totient is φ = 201001928182900.

The previous prime is 221102121001171. The next prime is 221102121001211. The reversal of 221102121001201 is 102100121201122.

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 221102121001201 - 2⁹ = 221102121000689 is a prime.

It is a super-2 number, since 2×221102121001201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102121001211) 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, 10050096409135 + ... + 10050096409156.

It is an arithmetic number, because the mean of its divisors is an integer number (60300578454876).

Almost surely, 2^{221102121001201} is an apocalyptic number.

It is an amenable number.

221102121001201 is a deficient number, since it is larger than the sum of its proper divisors (20100192818303).

221102121001201 is a wasteful number, since it uses less digits than its factorization.

221102121001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20100192818302.

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

Adding to 221102121001201 its reverse (102100121201122), we get a palindrome (323202242202323).

The spelling of 221102121001201 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty-one million, one thousand, two hundred one".