11212100121 has 8 divisors (see below), whose sum is σ = 15353506624. Its totient is φ = 7272713520.

The previous prime is 11212100101. The next prime is 11212100143. The reversal of 11212100121 is 12100121211.

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

It is not a de Polignac number, because 11212100121 - 2⁹ = 11212099609 is a prime.

It is a super-2 number, since 2×11212100121² (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 = 11212100097 and 11212100106.

It is not an unprimeable number, because it can be changed into a prime (11212100101) 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, 50504845 + ... + 50505066.

It is an arithmetic number, because the mean of its divisors is an integer number (1919188328).

Almost surely, 2^11212100121 is an apocalyptic number.

It is an amenable number.

11212100121 is a deficient number, since it is larger than the sum of its proper divisors (4141406503).

11212100121 is a wasteful number, since it uses less digits than its factorization.

11212100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101009951.

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

Adding to 11212100121 its reverse (12100121211), we get a palindrome (23312221332).

The spelling of 11212100121 in words is "eleven billion, two hundred twelve million, one hundred thousand, one hundred twenty-one".