21431134202 has 8 divisors (see below), whose sum is σ = 32158620000. Its totient is φ = 10711594204.

The previous prime is 21431134171. The next prime is 21431134223. The reversal of 21431134202 is 20243113412.

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, 1979702 + ... + 1990497.

It is an arithmetic number, because the mean of its divisors is an integer number (4019827500).

Almost surely, 2^21431134202 is an apocalyptic number.

21431134202 is a deficient number, since it is larger than the sum of its proper divisors (10727485798).

21431134202 is a wasteful number, since it uses less digits than its factorization.

21431134202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972900.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21431134202 its reverse (20243113412), we get a palindrome (41674247614).

The spelling of 21431134202 in words is "twenty-one billion, four hundred thirty-one million, one hundred thirty-four thousand, two hundred two".