21130223154121 has 8 divisors (see below), whose sum is σ = 22049031029184. Its totient is φ = 20211423822480.

The previous prime is 21130223154091. The next prime is 21130223154151. The reversal of 21130223154121 is 12145132203112.

It is an interprime number because it is at equal distance from previous prime (21130223154091) and next prime (21130223154151).

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 21130223154121 - 2⁷ = 21130223153993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21130223154121.

It is not an unprimeable number, because it can be changed into a prime (21130223154151) 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, 3202111 + ... + 7246651.

It is an arithmetic number, because the mean of its divisors is an integer number (2756128878648).

Almost surely, 2^{21130223154121} is an apocalyptic number.

It is an amenable number.

21130223154121 is a deficient number, since it is larger than the sum of its proper divisors (918807875063).

21130223154121 is a wasteful number, since it uses less digits than its factorization.

21130223154121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271711.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 21130223154121 its reverse (12145132203112), we get a palindrome (33275355357233).

The spelling of 21130223154121 in words is "twenty-one trillion, one hundred thirty billion, two hundred twenty-three million, one hundred fifty-four thousand, one hundred twenty-one".