21113343514106 has 4 divisors (see below), whose sum is σ = 31670015271162. Its totient is φ = 10556671757052.

The previous prime is 21113343514079. The next prime is 21113343514121. The reversal of 21113343514106 is 60141534331112.

It is a happy number.

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., 15766339369225 + 5347004144881 = 3970685^2 + 2312359^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278335878525 + ... + 5278335878528.

Almost surely, 2^{21113343514106} is an apocalyptic number.

21113343514106 is a deficient number, since it is larger than the sum of its proper divisors (10556671757056).

21113343514106 is a wasteful number, since it uses less digits than its factorization.

21113343514106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556671757055.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 21113343514106 its reverse (60141534331112), we get a palindrome (81254877845218).

The spelling of 21113343514106 in words is "twenty-one trillion, one hundred thirteen billion, three hundred forty-three million, five hundred fourteen thousand, one hundred six".