22021202121211 has 4 divisors (see below), whose sum is σ = 22194597413632. Its totient is φ = 21847806828792.

The previous prime is 22021202121197. The next prime is 22021202121229. The reversal of 22021202121211 is 11212120212022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22021202121211 - 2⁵ = 22021202121179 is a prime.

It is a super-2 number, since 2×22021202121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021202121011) 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, 86697646020 + ... + 86697646273.

It is an arithmetic number, because the mean of its divisors is an integer number (5548649353408).

Almost surely, 2^{22021202121211} is an apocalyptic number.

22021202121211 is a deficient number, since it is larger than the sum of its proper divisors (173395292421).

22021202121211 is a wasteful number, since it uses less digits than its factorization.

22021202121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173395292420.

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

Adding to 22021202121211 its reverse (11212120212022), we get a palindrome (33233322333233).

The spelling of 22021202121211 in words is "twenty-two trillion, twenty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred eleven".