21211110121102 has 16 divisors (see below), whose sum is σ = 34709160061872. Its totient is φ = 9641394032320.

The previous prime is 21211110121093. The next prime is 21211110121141. The reversal of 21211110121102 is 20112101111212.

It is a super-2 number, since 2×21211110121102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20112528 + ... + 21140860.

It is an arithmetic number, because the mean of its divisors is an integer number (2169322503867).

Almost surely, 2^{21211110121102} is an apocalyptic number.

21211110121102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21211110121102 is a deficient number, since it is larger than the sum of its proper divisors (13498049940770).

21211110121102 is a wasteful number, since it uses less digits than its factorization.

21211110121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965923.

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

Adding to 21211110121102 its reverse (20112101111212), we get a palindrome (41323211232314).

The spelling of 21211110121102 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, one hundred twenty-one thousand, one hundred two".