21133101121 has 16 divisors (see below), whose sum is σ = 23512991040. Its totient is φ = 18830393920.

The previous prime is 21133101107. The next prime is 21133101151. The reversal of 21133101121 is 12110133112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21133101121 - 2⁵ = 21133101089 is a prime.

It is a super-2 number, since 2×21133101121² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133101095 and 21133101104.

It is not an unprimeable number, because it can be changed into a prime (21133101151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576291 + ... + 611863.

It is an arithmetic number, because the mean of its divisors is an integer number (1469561940).

Almost surely, 2^21133101121 is an apocalyptic number.

It is an amenable number.

21133101121 is a deficient number, since it is larger than the sum of its proper divisors (2379889919).

21133101121 is a wasteful number, since it uses less digits than its factorization.

21133101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36656.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21133101121 its reverse (12110133112), we get a palindrome (33243234233).

The spelling of 21133101121 in words is "twenty-one billion, one hundred thirty-three million, one hundred one thousand, one hundred twenty-one".