21131143132 has 96 divisors (see below), whose sum is σ = 44587872000. Its totient is φ = 8653962240.

The previous prime is 21131143081. The next prime is 21131143169. The reversal of 21131143132 is 23134113112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1617844 + ... + 1630852.

It is an arithmetic number, because the mean of its divisors is an integer number (464457000).

Almost surely, 2^21131143132 is an apocalyptic number.

21131143132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21131143132 is an abundant number, since it is smaller than the sum of its proper divisors (23456728868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21131143132 is a wasteful number, since it uses less digits than its factorization.

21131143132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13139 (or 13137 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 21131143132 its reverse (23134113112), we get a palindrome (44265256244).

The spelling of 21131143132 in words is "twenty-one billion, one hundred thirty-one million, one hundred forty-three thousand, one hundred thirty-two".