23121011220011 has 8 divisors (see below), whose sum is σ = 24338828372880. Its totient is φ = 21903286249728.

The previous prime is 23121011219987. The next prime is 23121011220029. The reversal of 23121011220011 is 11002211012132.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23121011220011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121011220091) 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, 22530506 + ... + 23534351.

It is an arithmetic number, because the mean of its divisors is an integer number (3042353546610).

Almost surely, 2^{23121011220011} is an apocalyptic number.

23121011220011 is a deficient number, since it is larger than the sum of its proper divisors (1217817152869).

23121011220011 is a wasteful number, since it uses less digits than its factorization.

23121011220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46091293.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 23121011220011 its reverse (11002211012132), we get a palindrome (34123222232143).

The spelling of 23121011220011 in words is "twenty-three trillion, one hundred twenty-one billion, eleven million, two hundred twenty thousand, eleven".