21112211110002 has 16 divisors (see below), whose sum is σ = 44060266664640. Its totient is φ = 6731429629232.

The previous prime is 21112211109971. The next prime is 21112211110019. The reversal of 21112211110002 is 20001111221112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76493518377 + ... + 76493518652.

It is an arithmetic number, because the mean of its divisors is an integer number (2753766666540).

Almost surely, 2^{21112211110002} is an apocalyptic number.

21112211110002 is an abundant number, since it is smaller than the sum of its proper divisors (22948055554638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112211110002 is a wasteful number, since it uses less digits than its factorization.

21112211110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152987037057.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112211110002 its reverse (20001111221112), we get a palindrome (41113322331114).

It can be divided in two parts, 2111221 and 1110002, that added together give a palindrome (3221223).

The spelling of 21112211110002 in words is "twenty-one trillion, one hundred twelve billion, two hundred eleven million, one hundred ten thousand, two".