21112112221131 has 16 divisors (see below), whose sum is σ = 29173297886208. Its totient is φ = 13566451740000.

The previous prime is 21112112221127. The next prime is 21112112221141. The reversal of 21112112221131 is 13112221121112.

It is not a de Polignac number, because 21112112221131 - 2² = 21112112221127 is a prime.

It is a super-2 number, since 2×21112112221131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112112221098 and 21112112221107.

It is not an unprimeable number, because it can be changed into a prime (21112112221141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452191716 + ... + 452238401.

It is an arithmetic number, because the mean of its divisors is an integer number (1823331117888).

Almost surely, 2^{21112112221131} is an apocalyptic number.

21112112221131 is a deficient number, since it is larger than the sum of its proper divisors (8061185665077).

21112112221131 is a wasteful number, since it uses less digits than its factorization.

21112112221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904430402.

The product of its digits is 96, while the sum is 21.

Adding to 21112112221131 its reverse (13112221121112), we get a palindrome (34224333342243).

The spelling of 21112112221131 in words is "twenty-one trillion, one hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred thirty-one".