12211000222021 has 4 divisors (see below), whose sum is σ = 12211040813344. Its totient is φ = 12210959630700.

The previous prime is 12211000221961. The next prime is 12211000222027. The reversal of 12211000222021 is 12022200011221.

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 12211000222021 - 2¹³ = 12211000213829 is a prime.

It is a super-2 number, since 2×12211000222021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211000221986 and 12211000222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211000222027) 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, 19841025 + ... + 20447206.

It is an arithmetic number, because the mean of its divisors is an integer number (3052760203336).

Almost surely, 2^{12211000222021} is an apocalyptic number.

It is an amenable number.

12211000222021 is a deficient number, since it is larger than the sum of its proper divisors (40591323).

12211000222021 is an equidigital number, since it uses as much as digits as its factorization.

12211000222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40591322.

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

Adding to 12211000222021 its reverse (12022200011221), we get a palindrome (24233200233242).

The spelling of 12211000222021 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-two thousand, twenty-one".