98993115513221 has 4 divisors (see below), whose sum is σ = 98993225839212. Its totient is φ = 98993005187232.

The previous prime is 98993115513217. The next prime is 98993115513223. The reversal of 98993115513221 is 12231551139989.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98210359492996 + 782756020225 = 9910114^2 + 884735^2 .

It is a cyclic number.

It is not a de Polignac number, because 98993115513221 - 2² = 98993115513217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98993115513223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53805950 + ... + 55615343.

It is an arithmetic number, because the mean of its divisors is an integer number (24748306459803).

Almost surely, 2^{98993115513221} is an apocalyptic number.

It is an amenable number.

98993115513221 is a deficient number, since it is larger than the sum of its proper divisors (110325991).

98993115513221 is a wasteful number, since it uses less digits than its factorization.

98993115513221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110325990.

The product of its digits is 5248800, while the sum is 59.

The spelling of 98993115513221 in words is "ninety-eight trillion, nine hundred ninety-three billion, one hundred fifteen million, five hundred thirteen thousand, two hundred twenty-one".