21011155114 has 16 divisors (see below), whose sum is σ = 31686148296. Its totient is φ = 10449241600.

The previous prime is 21011155103. The next prime is 21011155147. The reversal of 21011155114 is 41155111012.

It can be written as a sum of positive squares in 4 ways, for example, as 15293526889 + 5717628225 = 123667^2 + 75615^2 .

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, 279474 + ... + 346594.

Almost surely, 2^21011155114 is an apocalyptic number.

21011155114 is a deficient number, since it is larger than the sum of its proper divisors (10674993182).

21011155114 is a wasteful number, since it uses less digits than its factorization.

21011155114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67961.

The product of its (nonzero) digits is 200, while the sum is 22.

Adding to 21011155114 its reverse (41155111012), we get a palindrome (62166266126).

It can be divided in two parts, 210111 and 55114, that added together give a square (265225 = 515²).

The spelling of 21011155114 in words is "twenty-one billion, eleven million, one hundred fifty-five thousand, one hundred fourteen".