11212001112221 has 24 divisors (see below), whose sum is σ = 14656490722944. Its totient is φ = 8485336712160.

The previous prime is 11212001112217. The next prime is 11212001112251. The reversal of 11212001112221 is 12221110021211.

It is not a de Polignac number, because 11212001112221 - 2² = 11212001112217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11212001112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212001112251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382621385 + ... + 382650686.

It is an arithmetic number, because the mean of its divisors is an integer number (610687113456).

Almost surely, 2^{11212001112221} is an apocalyptic number.

It is an amenable number.

11212001112221 is a deficient number, since it is larger than the sum of its proper divisors (3444489610723).

11212001112221 is a wasteful number, since it uses less digits than its factorization.

11212001112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765272121 (or 765272114 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11212001112221 its reverse (12221110021211), we get a palindrome (23433111133432).

The spelling of 11212001112221 in words is "eleven trillion, two hundred twelve billion, one million, one hundred twelve thousand, two hundred twenty-one".