21211112131102 has 16 divisors (see below), whose sum is σ = 31854282279552. Its totient is φ = 10593019349080.

The previous prime is 21211112131067. The next prime is 21211112131141. The reversal of 21211112131102 is 20113121111212.

It is a super-2 number, since 2×21211112131102² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21211112131102.

It is a congruent 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, 33038577 + ... + 33674467.

It is an arithmetic number, because the mean of its divisors is an integer number (1990892642472).

Almost surely, 2^{21211112131102} is an apocalyptic number.

21211112131102 is a deficient number, since it is larger than the sum of its proper divisors (10643170148450).

21211112131102 is a wasteful number, since it uses less digits than its factorization.

21211112131102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655583.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 21211112131102 its reverse (20113121111212), we get a palindrome (41324233242314).

The spelling of 21211112131102 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, one hundred thirty-one thousand, one hundred two".