21202211011 has 8 divisors (see below), whose sum is σ = 22532243904. Its totient is φ = 19881383040.

The previous prime is 21202210993. The next prime is 21202211053. The reversal of 21202211011 is 11011220212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21202211011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202210982 and 21202211000.

It is not an unprimeable number, because it can be changed into a prime (21202211071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2296480 + ... + 2305693.

It is an arithmetic number, because the mean of its divisors is an integer number (2816530488).

Almost surely, 2^21202211011 is an apocalyptic number.

21202211011 is a deficient number, since it is larger than the sum of its proper divisors (1330032893).

21202211011 is a wasteful number, since it uses less digits than its factorization.

21202211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602461.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21202211011 its reverse (11011220212), we get a palindrome (32213431223).

The spelling of 21202211011 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, eleven".