21222211011010 has 32 divisors (see below), whose sum is σ = 39563011491840. Its totient is φ = 8186666862528.

The previous prime is 21222211010953. The next prime is 21222211011011. The reversal of 21222211011010 is 1011011222212.

It is not an unprimeable number, because it can be changed into a prime (21222211011011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42148362 + ... + 42648901.

It is an arithmetic number, because the mean of its divisors is an integer number (1236344109120).

Almost surely, 2^{21222211011010} is an apocalyptic number.

21222211011010 is a deficient number, since it is larger than the sum of its proper divisors (18340800480830).

21222211011010 is a wasteful number, since it uses less digits than its factorization.

21222211011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84798162.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21222211011010 its reverse (1011011222212), we get a palindrome (22233222233222).

It can be divided in two parts, 212 and 22211011010, that added together give a palindrome (22211011222).

The spelling of 21222211011010 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, eleven thousand, ten".