212222021001001 has 4 divisors (see below), whose sum is σ = 231514932001104. Its totient is φ = 192929110000900.

The previous prime is 212222021000999. The next prime is 212222021001101. The reversal of 212222021001001 is 100100120222212.

It is a happy number.

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 212222021001001 - 2¹ = 212222021000999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222021001101) 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, 9646455500035 + ... + 9646455500056.

It is an arithmetic number, because the mean of its divisors is an integer number (57878733000276).

Almost surely, 2^{212222021001001} is an apocalyptic number.

It is an amenable number.

212222021001001 is a deficient number, since it is larger than the sum of its proper divisors (19292911000103).

212222021001001 is a wasteful number, since it uses less digits than its factorization.

212222021001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19292911000102.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212222021001001 its reverse (100100120222212), we get a palindrome (312322141223213).

The spelling of 212222021001001 in words is "two hundred twelve trillion, two hundred twenty-two billion, twenty-one million, one thousand, one".