21120000002231 has 8 divisors (see below), whose sum is σ = 22945895170800. Its totient is φ = 19322859088512.

The previous prime is 21120000002161. The next prime is 21120000002239. The reversal of 21120000002231 is 13220000002112.

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 not a de Polignac number, because 21120000002231 - 2¹⁰ = 21120000001207 is a prime.

It is a super-2 number, since 2×21120000002231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120000002239) 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, 7188562181 + ... + 7188565118.

It is an arithmetic number, because the mean of its divisors is an integer number (2868236896350).

Almost surely, 2^{21120000002231} is an apocalyptic number.

21120000002231 is a deficient number, since it is larger than the sum of its proper divisors (1825895168569).

21120000002231 is a wasteful number, since it uses less digits than its factorization.

21120000002231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14377127425.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21120000002231 its reverse (13220000002112), we get a palindrome (34340000004343).

The spelling of 21120000002231 in words is "twenty-one trillion, one hundred twenty billion, two thousand, two hundred thirty-one".