21400122010 has 16 divisors (see below), whose sum is σ = 38814269472. Its totient is φ = 8494704400.

The previous prime is 21400121983. The next prime is 21400122071. The reversal of 21400122010 is 1022100412.

It is a happy number.

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, 8166676 + ... + 8169295.

It is an arithmetic number, because the mean of its divisors is an integer number (2425891842).

Almost surely, 2^21400122010 is an apocalyptic number.

21400122010 is a deficient number, since it is larger than the sum of its proper divisors (17414147462).

21400122010 is a wasteful number, since it uses less digits than its factorization.

21400122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16336109.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21400122010 its reverse (1022100412), we get a palindrome (22422222422).

The spelling of 21400122010 in words is "twenty-one billion, four hundred million, one hundred twenty-two thousand, ten".