21131430002 has 8 divisors (see below), whose sum is σ = 31698093312. Its totient is φ = 10565398900.

The previous prime is 21131429999. The next prime is 21131430011. The reversal of 21131430002 is 20003413112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63074 + ... + 215037.

It is an arithmetic number, because the mean of its divisors is an integer number (3962261664).

Almost surely, 2^21131430002 is an apocalyptic number.

21131430002 is a deficient number, since it is larger than the sum of its proper divisors (10566663310).

21131430002 is a wasteful number, since it uses less digits than its factorization.

21131430002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316104.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21131430002 its reverse (20003413112), we get a palindrome (41134843114).

The spelling of 21131430002 in words is "twenty-one billion, one hundred thirty-one million, four hundred thirty thousand, two".