21111012022111 has 8 divisors (see below), whose sum is σ = 23258216666448. Its totient is φ = 19001811000000.

The previous prime is 21111012022103. The next prime is 21111012022129. The reversal of 21111012022111 is 11122021011112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21111012022111 - 2³ = 21111012022103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111012022811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9500904390 + ... + 9500906611.

It is an arithmetic number, because the mean of its divisors is an integer number (2907277083306).

Almost surely, 2^{21111012022111} is an apocalyptic number.

21111012022111 is a deficient number, since it is larger than the sum of its proper divisors (2147204644337).

21111012022111 is a wasteful number, since it uses less digits than its factorization.

21111012022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19001811113.

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

Adding to 21111012022111 its reverse (11122021011112), we get a palindrome (32233033033223).

It can be divided in two parts, 211110 and 12022111, that added together give a palindrome (12233221).

The spelling of 21111012022111 in words is "twenty-one trillion, one hundred eleven billion, twelve million, twenty-two thousand, one hundred eleven".