21212200111022 has 16 divisors (see below), whose sum is σ = 32420392620912. Its totient is φ = 10405424140800.

The previous prime is 21212200111021. The next prime is 21212200111031. The reversal of 21212200111022 is 22011100221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212200111021) 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, 3412979 + ... + 7353422.

It is an arithmetic number, because the mean of its divisors is an integer number (2026274538807).

Almost surely, 2^{21212200111022} is an apocalyptic number.

21212200111022 is a deficient number, since it is larger than the sum of its proper divisors (11208192509890).

21212200111022 is a wasteful number, since it uses less digits than its factorization.

21212200111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10785043.

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

Adding to 21212200111022 its reverse (22011100221212), we get a palindrome (43223300332234).

The spelling of 21212200111022 in words is "twenty-one trillion, two hundred twelve billion, two hundred million, one hundred eleven thousand, twenty-two".