21121000098 has 32 divisors (see below), whose sum is σ = 46087755840. Its totient is φ = 6399528960.

The previous prime is 21121000081. The next prime is 21121000129. The reversal of 21121000098 is 89000012112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776586 + ... + 803322.

It is an arithmetic number, because the mean of its divisors is an integer number (1440242370).

Almost surely, 2^21121000098 is an apocalyptic number.

21121000098 is an abundant number, since it is smaller than the sum of its proper divisors (24966755742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121000098 is a wasteful number, since it uses less digits than its factorization.

21121000098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38722.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 21121000098 in words is "twenty-one billion, one hundred twenty-one million, ninety-eight", and thus it is an aban number.