21031011122 has 32 divisors (see below), whose sum is σ = 35687793024. Its totient is φ = 9210844800.

The previous prime is 21031011121. The next prime is 21031011241. The reversal of 21031011122 is 22111013012.

It is a junction number, because it is equal to n+sod(n) for n = 21031011097 and 21031011106.

It is not an unprimeable number, because it can be changed into a prime (21031011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41579 + ... + 209262.

It is an arithmetic number, because the mean of its divisors is an integer number (1115243532).

Almost surely, 2^21031011122 is an apocalyptic number.

21031011122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21031011122 is a deficient number, since it is larger than the sum of its proper divisors (14656781902).

21031011122 is a wasteful number, since it uses less digits than its factorization.

21031011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250994.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21031011122 its reverse (22111013012), we get a palindrome (43142024134).

The spelling of 21031011122 in words is "twenty-one billion, thirty-one million, eleven thousand, one hundred twenty-two".