21121012132 has 48 divisors (see below), whose sum is σ = 42035019264. Its totient is φ = 9198720000.

The previous prime is 21121012103. The next prime is 21121012189. The reversal of 21121012132 is 23121012112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61108 + ... + 214420.

It is an arithmetic number, because the mean of its divisors is an integer number (875729568).

Almost surely, 2^21121012132 is an apocalyptic number.

21121012132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21121012132 is a deficient number, since it is larger than the sum of its proper divisors (20914007132).

21121012132 is a wasteful number, since it uses less digits than its factorization.

21121012132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153460 (or 153458 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21121012132 its reverse (23121012112), we get a palindrome (44242024244).

The spelling of 21121012132 in words is "twenty-one billion, one hundred twenty-one million, twelve thousand, one hundred thirty-two".