22122121021001 has 4 divisors (see below), whose sum is σ = 22122156864900. Its totient is φ = 22122085177104.

The previous prime is 22122121020953. The next prime is 22122121021069. The reversal of 22122121021001 is 10012012122122.

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 16530314931001 + 5591806090000 = 4065749^2 + 2364700^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122121021001 - 2³⁸ = 21847243114057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22122121021901) 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, 16979666 + ... + 18236043.

It is an arithmetic number, because the mean of its divisors is an integer number (5530539216225).

Almost surely, 2^{22122121021001} is an apocalyptic number.

It is an amenable number.

22122121021001 is a deficient number, since it is larger than the sum of its proper divisors (35843899).

22122121021001 is an equidigital number, since it uses as much as digits as its factorization.

22122121021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35843898.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22122121021001 its reverse (10012012122122), we get a palindrome (32134133143123).

The spelling of 22122121021001 in words is "twenty-two trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, one".