222121220212001 has 4 divisors (see below), whose sum is σ = 242314058413104. Its totient is φ = 201928382010900.

The previous prime is 222121220211983. The next prime is 222121220212009. The reversal of 222121220212001 is 100212022121222.

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 222121220212001 - 2²² = 222121216017697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121220212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10096419100535 + ... + 10096419100556.

It is an arithmetic number, because the mean of its divisors is an integer number (60578514603276).

Almost surely, 2^{222121220212001} is an apocalyptic number.

It is an amenable number.

222121220212001 is a deficient number, since it is larger than the sum of its proper divisors (20192838201103).

222121220212001 is a wasteful number, since it uses less digits than its factorization.

222121220212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192838201102.

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

Adding to 222121220212001 its reverse (100212022121222), we get a palindrome (322333242333223).

The spelling of 222121220212001 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, one".