21031421410 has 16 divisors (see below), whose sum is σ = 38128910400. Its totient is φ = 8352045936.

The previous prime is 21031421407. The next prime is 21031421431. The reversal of 21031421410 is 1412413012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7563870 + ... + 7566649.

It is an arithmetic number, because the mean of its divisors is an integer number (2383056900).

Almost surely, 2^21031421410 is an apocalyptic number.

21031421410 is a deficient number, since it is larger than the sum of its proper divisors (17097488990).

21031421410 is a wasteful number, since it uses less digits than its factorization.

21031421410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15130665.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21031421410 its reverse (1412413012), we get a palindrome (22443834422).

The spelling of 21031421410 in words is "twenty-one billion, thirty-one million, four hundred twenty-one thousand, four hundred ten".