22222112121001 has 4 divisors (see below), whose sum is σ = 23931505361092. Its totient is φ = 20512718880912.

The previous prime is 22222112120993. The next prime is 22222112121059. The reversal of 22222112121001 is 10012121122222.

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 14546862981225 + 7675249139776 = 3814035^2 + 2770424^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222112121001 - 2³ = 22222112120993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22222112121001.

It is not an unprimeable number, because it can be changed into a prime (22222112121091) 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, 854696620026 + ... + 854696620051.

It is an arithmetic number, because the mean of its divisors is an integer number (5982876340273).

Almost surely, 2^{22222112121001} is an apocalyptic number.

It is an amenable number.

22222112121001 is a deficient number, since it is larger than the sum of its proper divisors (1709393240091).

22222112121001 is a wasteful number, since it uses less digits than its factorization.

22222112121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709393240090.

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

Adding to 22222112121001 its reverse (10012121122222), we get a palindrome (32234233243223).

The spelling of 22222112121001 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, one".