21011212298 has 32 divisors (see below), whose sum is σ = 33099667200. Its totient is φ = 9989433216.

The previous prime is 21011212297. The next prime is 21011212331. The reversal of 21011212298 is 89221211012.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 21011212298.

It is not an unprimeable number, because it can be changed into a prime (21011212297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3142523 + ... + 3149201.

It is an arithmetic number, because the mean of its divisors is an integer number (1034364600).

Almost surely, 2^21011212298 is an apocalyptic number.

21011212298 is a deficient number, since it is larger than the sum of its proper divisors (12088454902).

21011212298 is a wasteful number, since it uses less digits than its factorization.

21011212298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7526.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 21011212298 in words is "twenty-one billion, eleven million, two hundred twelve thousand, two hundred ninety-eight".