21131203014 has 24 divisors (see below), whose sum is σ = 48477466440. Its totient is φ = 6629396928.

The previous prime is 21131203013. The next prime is 21131203019. The reversal of 21131203014 is 41030213112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131203013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34527804 + ... + 34528415.

It is an arithmetic number, because the mean of its divisors is an integer number (2019894435).

Almost surely, 2^21131203014 is an apocalyptic number.

21131203014 is an abundant number, since it is smaller than the sum of its proper divisors (27346263426).

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

21131203014 is a wasteful number, since it uses less digits than its factorization.

21131203014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69056244 (or 69056241 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21131203014 its reverse (41030213112), we get a palindrome (62161416126).

The spelling of 21131203014 in words is "twenty-one billion, one hundred thirty-one million, two hundred three thousand, fourteen".