21010001122 has 16 divisors (see below), whose sum is σ = 34383722400. Its totient is φ = 9548967040.

The previous prime is 21010001119. The next prime is 21010001141. The reversal of 21010001122 is 22110001012.

It is a junction number, because it is equal to n+sod(n) for n = 21010001099 and 21010001108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179154 + ... + 272242.

It is an arithmetic number, because the mean of its divisors is an integer number (2148982650).

Almost surely, 2^21010001122 is an apocalyptic number.

21010001122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21010001122 is a deficient number, since it is larger than the sum of its proper divisors (13373721278).

21010001122 is a wasteful number, since it uses less digits than its factorization.

21010001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103361.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21010001122 its reverse (22110001012), we get a palindrome (43120002134).

The spelling of 21010001122 in words is "twenty-one billion, ten million, one thousand, one hundred twenty-two".