21202211210 has 16 divisors (see below), whose sum is σ = 39823284096. Its totient is φ = 8112150288.

The previous prime is 21202211189. The next prime is 21202211243. The reversal of 21202211210 is 1211220212.

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, 46091534 + ... + 46091993.

It is an arithmetic number, because the mean of its divisors is an integer number (2488955256).

Almost surely, 2^21202211210 is an apocalyptic number.

21202211210 is a deficient number, since it is larger than the sum of its proper divisors (18621072886).

21202211210 is a wasteful number, since it uses less digits than its factorization.

21202211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92183557.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202211210 its reverse (1211220212), we get a palindrome (22413431422).

The spelling of 21202211210 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred ten".