221211211000022 has 4 divisors (see below), whose sum is σ = 331816816500036. Its totient is φ = 110605605500010.

The previous prime is 221211211000009. The next prime is 221211211000027. The reversal of 221211211000022 is 220000112112122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211211000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302802750004 + ... + 55302802750007.

It is an arithmetic number, because the mean of its divisors is an integer number (82954204125009).

Almost surely, 2^{221211211000022} is an apocalyptic number.

221211211000022 is a deficient number, since it is larger than the sum of its proper divisors (110605605500014).

221211211000022 is a wasteful number, since it uses less digits than its factorization.

221211211000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110605605500013.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211211000022 its reverse (220000112112122), we get a palindrome (441211323112144).

The spelling of 221211211000022 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred eleven million, twenty-two", and thus it is an aban number.