21112020000122 has 4 divisors (see below), whose sum is σ = 31668030000186. Its totient is φ = 10556010000060.

The previous prime is 21112020000047. The next prime is 21112020000179. The reversal of 21112020000122 is 22100002021112.

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., 17927933071321 + 3184086928801 = 4234139^2 + 1784401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21112020000097 and 21112020000106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278005000029 + ... + 5278005000032.

Almost surely, 2^{21112020000122} is an apocalyptic number.

21112020000122 is a deficient number, since it is larger than the sum of its proper divisors (10556010000064).

21112020000122 is a wasteful number, since it uses less digits than its factorization.

21112020000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556010000063.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21112020000122 its reverse (22100002021112), we get a palindrome (43212022021234).

The spelling of 21112020000122 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty-two", and thus it is an aban number.