22021211121211 has 4 divisors (see below), whose sum is σ = 22021273656000. Its totient is φ = 22021148586424.

The previous prime is 22021211121181. The next prime is 22021211121253. The reversal of 22021211121211 is 11212111212022.

It is a happy number.

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 22021211121211 - 2¹³ = 22021211113019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021211121011) 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, 30736171 + ... + 31444468.

It is an arithmetic number, because the mean of its divisors is an integer number (5505318414000).

Almost surely, 2^{22021211121211} is an apocalyptic number.

22021211121211 is a deficient number, since it is larger than the sum of its proper divisors (62534789).

22021211121211 is an equidigital number, since it uses as much as digits as its factorization.

22021211121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62534788.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22021211121211 its reverse (11212111212022), we get a palindrome (33233322333233).

The spelling of 22021211121211 in words is "twenty-two trillion, twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred eleven".