11212110021 has 8 divisors (see below), whose sum is σ = 17085120064. Its totient is φ = 6406920000.

The previous prime is 11212110001. The next prime is 11212110031. The reversal of 11212110021 is 12001121211.

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

It is not a de Polignac number, because 11212110021 - 2¹⁷ = 11211978949 is a prime.

It is a super-2 number, since 2×11212110021² (a number of 21 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 = 11212109979 and 11212110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212110001) 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, 266954980 + ... + 266955021.

It is an arithmetic number, because the mean of its divisors is an integer number (2135640008).

Almost surely, 2^11212110021 is an apocalyptic number.

It is an amenable number.

11212110021 is a deficient number, since it is larger than the sum of its proper divisors (5873010043).

11212110021 is an equidigital number, since it uses as much as digits as its factorization.

11212110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533910011.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11212110021 its reverse (12001121211), we get a palindrome (23213231232).

The spelling of 11212110021 in words is "eleven billion, two hundred twelve million, one hundred ten thousand, twenty-one".