21111120210122 has 16 divisors (see below), whose sum is σ = 32759085803400. Its totient is φ = 10191434964480.

The previous prime is 21111120210121. The next prime is 21111120210143. The reversal of 21111120210122 is 22101202111112.

It can be written as a sum of positive squares in 4 ways, for example, as 16469547276361 + 4641572933761 = 4058269^2 + 2154431^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21111120210122.

It is not an unprimeable number, because it can be changed into a prime (21111120210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1807154 + ... + 6744482.

Almost surely, 2^{21111120210122} is an apocalyptic number.

21111120210122 is a deficient number, since it is larger than the sum of its proper divisors (11647965593278).

21111120210122 is a wasteful number, since it uses less digits than its factorization.

21111120210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011081.

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

Adding to 21111120210122 its reverse (22101202111112), we get a palindrome (43212322321234).

The spelling of 21111120210122 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-two".