21033212198 has 16 divisors (see below), whose sum is σ = 32200439760. Its totient is φ = 10301019936.

The previous prime is 21033212197. The next prime is 21033212219. The reversal of 21033212198 is 89121233012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033212197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289061 + ... + 354432.

It is an arithmetic number, because the mean of its divisors is an integer number (2012527485).

Almost surely, 2^21033212198 is an apocalyptic number.

21033212198 is a deficient number, since it is larger than the sum of its proper divisors (11167227562).

21033212198 is a wasteful number, since it uses less digits than its factorization.

21033212198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643831.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 21033212198 in words is "twenty-one billion, thirty-three million, two hundred twelve thousand, one hundred ninety-eight".