21111212011022 has 16 divisors (see below), whose sum is σ = 36254030347392. Its totient is φ = 9031816994040.

The previous prime is 21111212010979. The next prime is 21111212011049. The reversal of 21111212011022 is 22011021211112.

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, 1320433088 + ... + 1320449075.

It is an arithmetic number, because the mean of its divisors is an integer number (2265876896712).

Almost surely, 2^{21111212011022} is an apocalyptic number.

21111212011022 is a deficient number, since it is larger than the sum of its proper divisors (15142818336370).

21111212011022 is a wasteful number, since it uses less digits than its factorization.

21111212011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640882743.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21111212011022 its reverse (22011021211112), we get a palindrome (43122233222134).

The spelling of 21111212011022 in words is "twenty-one trillion, one hundred eleven billion, two hundred twelve million, eleven thousand, twenty-two".