11212121003 has 8 divisors (see below), whose sum is σ = 11278234656. Its totient is φ = 11146161600.

The previous prime is 11212120981. The next prime is 11212121017. The reversal of 11212121003 is 30012121211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11212121003 - 2⁸ = 11212120747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212121023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108893 + ... + 185153.

It is an arithmetic number, because the mean of its divisors is an integer number (1409779332).

Almost surely, 2^11212121003 is an apocalyptic number.

11212121003 is a deficient number, since it is larger than the sum of its proper divisors (66113653).

11212121003 is an equidigital number, since it uses as much as digits as its factorization.

11212121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77125.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11212121003 its reverse (30012121211), we get a palindrome (41224242214).

The spelling of 11212121003 in words is "eleven billion, two hundred twelve million, one hundred twenty-one thousand, three".