21010111011122 has 4 divisors (see below), whose sum is σ = 31515166516686. Its totient is φ = 10505055505560.

The previous prime is 21010111011053. The next prime is 21010111011191. The reversal of 21010111011122 is 22111011101012.

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

It is an interprime number because it is at equal distance from previous prime (21010111011053) and next prime (21010111011191).

It can be written as a sum of positive squares in only one way, i.e., 16789432495081 + 4220678516041 = 4097491^2 + 2054429^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21010111011097 and 21010111011106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252527752779 + ... + 5252527752782.

Almost surely, 2^{21010111011122} is an apocalyptic number.

21010111011122 is a deficient number, since it is larger than the sum of its proper divisors (10505055505564).

21010111011122 is a wasteful number, since it uses less digits than its factorization.

21010111011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505055505563.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21010111011122 its reverse (22111011101012), we get a palindrome (43121122112134).

The spelling of 21010111011122 in words is "twenty-one trillion, ten billion, one hundred eleven million, eleven thousand, one hundred twenty-two".