21152211115342 has 16 divisors (see below), whose sum is σ = 31985044361280. Its totient is φ = 10490874032128.

The previous prime is 21152211115289. The next prime is 21152211115361. The reversal of 21152211115342 is 24351111225112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85969543 + ... + 86215234.

It is an arithmetic number, because the mean of its divisors is an integer number (1999065272580).

Almost surely, 2^{21152211115342} is an apocalyptic number.

21152211115342 is a deficient number, since it is larger than the sum of its proper divisors (10832833245938).

21152211115342 is a wasteful number, since it uses less digits than its factorization.

21152211115342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172185275.

The product of its digits is 4800, while the sum is 31.

The spelling of 21152211115342 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred eleven million, one hundred fifteen thousand, three hundred forty-two".