21100010210122 has 4 divisors (see below), whose sum is σ = 31650015315186. Its totient is φ = 10550005105060.

The previous prime is 21100010210117. The next prime is 21100010210131. The reversal of 21100010210122 is 22101201000112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12686640072561 + 8413370137561 = 3561831^2 + 2900581^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275002552529 + ... + 5275002552532.

Almost surely, 2^{21100010210122} is an apocalyptic number.

21100010210122 is a deficient number, since it is larger than the sum of its proper divisors (10550005105064).

21100010210122 is a wasteful number, since it uses less digits than its factorization.

21100010210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550005105063.

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

Adding to 21100010210122 its reverse (22101201000112), we get a palindrome (43201211210234).

The spelling of 21100010210122 in words is "twenty-one trillion, one hundred billion, ten million, two hundred ten thousand, one hundred twenty-two".