21112221110002 has 32 divisors (see below), whose sum is σ = 34585752366144. Its totient is φ = 9585780494400.

The previous prime is 21112221109999. The next prime is 21112221110009. The reversal of 21112221110002 is 20001112221112.

It is a super-2 number, since 2×21112221110002² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112221110009) 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, 75652108 + ... + 75930664.

It is an arithmetic number, because the mean of its divisors is an integer number (1080804761442).

Almost surely, 2^{21112221110002} is an apocalyptic number.

21112221110002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112221110002 is a deficient number, since it is larger than the sum of its proper divisors (13473531256142).

21112221110002 is a wasteful number, since it uses less digits than its factorization.

21112221110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282394.

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

Adding to 21112221110002 its reverse (20001112221112), we get a palindrome (41113333331114).

The spelling of 21112221110002 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, two".