11212220001 has 24 divisors (see below), whose sum is σ = 16310001280. Its totient is φ = 6844960512.

The previous prime is 11212219999. The next prime is 11212220023. The reversal of 11212220001 is 10002221211.

It is not a de Polignac number, because 11212220001 - 2¹ = 11212219999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11212220081) 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, 142681 + ... + 206838.

Almost surely, 2^11212220001 is an apocalyptic number.

It is an amenable number.

11212220001 is a deficient number, since it is larger than the sum of its proper divisors (5097781279).

11212220001 is a wasteful number, since it uses less digits than its factorization.

11212220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349593 (or 349576 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11212220001 its reverse (10002221211), we get a palindrome (21214441212).

The spelling of 11212220001 in words is "eleven billion, two hundred twelve million, two hundred twenty thousand, one".