21131232022 has 4 divisors (see below), whose sum is σ = 31696848036. Its totient is φ = 10565616010.

The previous prime is 21131232011. The next prime is 21131232029. The reversal of 21131232022 is 22023213112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131232029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5282808004 + ... + 5282808007.

It is an arithmetic number, because the mean of its divisors is an integer number (7924212009).

Almost surely, 2^21131232022 is an apocalyptic number.

21131232022 is a deficient number, since it is larger than the sum of its proper divisors (10565616014).

21131232022 is a wasteful number, since it uses less digits than its factorization.

21131232022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565616013.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21131232022 its reverse (22023213112), we get a palindrome (43154445134).

The spelling of 21131232022 in words is "twenty-one billion, one hundred thirty-one million, two hundred thirty-two thousand, twenty-two".