21040120098 has 24 divisors (see below), whose sum is σ = 47986239600. Its totient is φ = 6644248344.

The previous prime is 21040120093. The next prime is 21040120111. The reversal of 21040120098 is 89002104012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21040120093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30760068 + ... + 30760751.

It is an arithmetic number, because the mean of its divisors is an integer number (1999426650).

Almost surely, 2^21040120098 is an apocalyptic number.

21040120098 is an abundant number, since it is smaller than the sum of its proper divisors (26946119502).

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

21040120098 is a wasteful number, since it uses less digits than its factorization.

21040120098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61520846 (or 61520843 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 21040120098 in words is "twenty-one billion, forty million, one hundred twenty thousand, ninety-eight".