21121301230 has 8 divisors (see below), whose sum is σ = 38018342232. Its totient is φ = 8448520488.

The previous prime is 21121301209. The next prime is 21121301237. The reversal of 21121301230 is 3210312112.

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

It is a super-2 number, since 2×21121301230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121301237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056065052 + ... + 1056065071.

It is an arithmetic number, because the mean of its divisors is an integer number (4752292779).

Almost surely, 2^21121301230 is an apocalyptic number.

21121301230 is a deficient number, since it is larger than the sum of its proper divisors (16897041002).

21121301230 is a wasteful number, since it uses less digits than its factorization.

21121301230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112130130.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21121301230 its reverse (3210312112), we get a palindrome (24331613342).

The spelling of 21121301230 in words is "twenty-one billion, one hundred twenty-one million, three hundred one thousand, two hundred thirty".