21110210122 has 8 divisors (see below), whose sum is σ = 33527980836. Its totient is φ = 9934216512.

The previous prime is 21110210063. The next prime is 21110210131. The reversal of 21110210122 is 22101201112.

It can be written as a sum of positive squares in 2 ways, for example, as 20750690601 + 359519521 = 144051^2 + 18961^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310444233 + ... + 310444300.

Almost surely, 2^21110210122 is an apocalyptic number.

21110210122 is a deficient number, since it is larger than the sum of its proper divisors (12417770714).

21110210122 is a wasteful number, since it uses less digits than its factorization.

21110210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620888552.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21110210122 its reverse (22101201112), we get a palindrome (43211411234).

The spelling of 21110210122 in words is "twenty-one billion, one hundred ten million, two hundred ten thousand, one hundred twenty-two".