21011230013198 has 4 divisors (see below), whose sum is σ = 31516845019800. Its totient is φ = 10505615006598.

The previous prime is 21011230013197. The next prime is 21011230013239. The reversal of 21011230013198 is 89131003211012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011230013197) by changing a digit.

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 as a sum of consecutive naturals, namely, 5252807503298 + ... + 5252807503301.

It is an arithmetic number, because the mean of its divisors is an integer number (7879211254950).

Almost surely, 2^{21011230013198} is an apocalyptic number.

21011230013198 is a deficient number, since it is larger than the sum of its proper divisors (10505615006602).

21011230013198 is a wasteful number, since it uses less digits than its factorization.

21011230013198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505615006601.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 21011230013198 in words is "twenty-one trillion, eleven billion, two hundred thirty million, thirteen thousand, one hundred ninety-eight".