21111110100222 has 32 divisors (see below), whose sum is σ = 42289677830400. Its totient is φ = 7025794692480.

The previous prime is 21111110100191. The next prime is 21111110100259. The reversal of 21111110100222 is 22200101111112.

It is a happy number.

It is a super-3 number, since 3×21111110100222³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102678279 + ... + 102883677.

It is an arithmetic number, because the mean of its divisors is an integer number (1321552432200).

Almost surely, 2^{21111110100222} is an apocalyptic number.

21111110100222 is an abundant number, since it is smaller than the sum of its proper divisors (21178567730178).

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

21111110100222 is a wasteful number, since it uses less digits than its factorization.

21111110100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232688.

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

Adding to 21111110100222 its reverse (22200101111112), we get a palindrome (43311211211334).

The spelling of 21111110100222 in words is "twenty-one trillion, one hundred eleven billion, one hundred ten million, one hundred thousand, two hundred twenty-two".