21110202022211 has 8 divisors (see below), whose sum is σ = 21798437682048. Its totient is φ = 20422420200000.

The previous prime is 21110202022123. The next prime is 21110202022229. The reversal of 21110202022211 is 11222020201112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110202022211 is a prime.

It is a super-2 number, since 2×21110202022211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21110202022211.

It is not an unprimeable number, because it can be changed into a prime (21110202022291) 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, 113364860 + ... + 113550921.

It is an arithmetic number, because the mean of its divisors is an integer number (2724804710256).

Almost surely, 2^{21110202022211} is an apocalyptic number.

21110202022211 is a deficient number, since it is larger than the sum of its proper divisors (688235659837).

21110202022211 is a wasteful number, since it uses less digits than its factorization.

21110202022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226918813.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21110202022211 its reverse (11222020201112), we get a palindrome (32332222223323).

The spelling of 21110202022211 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, twenty-two thousand, two hundred eleven".