22211222212001 has 4 divisors (see below), whose sum is σ = 22211590026132. Its totient is φ = 22210854397872.

The previous prime is 22211222211979. The next prime is 22211222212129. The reversal of 22211222212001 is 10021222211222.

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 14583241077601 + 7627981134400 = 3818801^2 + 2761880^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211222212001 - 2²² = 22211218017697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22211212212001) 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, 183816470 + ... + 183937263.

It is an arithmetic number, because the mean of its divisors is an integer number (5552897506533).

Almost surely, 2^{22211222212001} is an apocalyptic number.

It is an amenable number.

22211222212001 is a deficient number, since it is larger than the sum of its proper divisors (367814131).

22211222212001 is an equidigital number, since it uses as much as digits as its factorization.

22211222212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367814130.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22211222212001 its reverse (10021222211222), we get a palindrome (32232444423223).

The spelling of 22211222212001 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, one".