21121232150 has 48 divisors (see below), whose sum is σ = 40662732240. Its totient is φ = 8152636800.

The previous prime is 21121232141. The next prime is 21121232159. The reversal of 21121232150 is 5123212112.

It is an interprime number because it is at equal distance from previous prime (21121232141) and next prime (21121232159).

It is a super-2 number, since 2×21121232150² (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 (21121232159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3922460 + ... + 3927840.

It is an arithmetic number, because the mean of its divisors is an integer number (847140255).

Almost surely, 2^21121232150 is an apocalyptic number.

21121232150 is a deficient number, since it is larger than the sum of its proper divisors (19541500090).

21121232150 is a wasteful number, since it uses less digits than its factorization.

21121232150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8129 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21121232150 its reverse (5123212112), we get a palindrome (26244444262).

The spelling of 21121232150 in words is "twenty-one billion, one hundred twenty-one million, two hundred thirty-two thousand, one hundred fifty".