21203213221034 has 16 divisors (see below), whose sum is σ = 34265913373440. Its totient is φ = 9781935855600.

The previous prime is 21203213220979. The next prime is 21203213221093. The reversal of 21203213221034 is 43012231230212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 21203213220994 and 21203213221012.

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, 173377454 + ... + 173499705.

It is an arithmetic number, because the mean of its divisors is an integer number (2141619585840).

Almost surely, 2^{21203213221034} is an apocalyptic number.

21203213221034 is a deficient number, since it is larger than the sum of its proper divisors (13062700152406).

21203213221034 is a wasteful number, since it uses less digits than its factorization.

21203213221034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346879525.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21203213221034 its reverse (43012231230212), we get a palindrome (64215444451246).

The spelling of 21203213221034 in words is "twenty-one trillion, two hundred three billion, two hundred thirteen million, two hundred twenty-one thousand, thirty-four".