221022120001 has 4 divisors (see below), whose sum is σ = 221024738692. Its totient is φ = 221019501312.

The previous prime is 221022119971. The next prime is 221022120091. The reversal of 221022120001 is 100021220122.

It is a happy number.

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 64491110401 + 156531009600 = 253951^2 + 395640^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022120001 - 2¹³ = 221022111809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022120091) 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, 1178376 + ... + 1353001.

It is an arithmetic number, because the mean of its divisors is an integer number (55256184673).

Almost surely, 2^221022120001 is an apocalyptic number.

It is an amenable number.

221022120001 is a deficient number, since it is larger than the sum of its proper divisors (2618691).

221022120001 is an equidigital number, since it uses as much as digits as its factorization.

221022120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618690.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221022120001 its reverse (100021220122), we get a palindrome (321043340123).

The spelling of 221022120001 in words is "two hundred twenty-one billion, twenty-two million, one hundred twenty thousand, one".