98212491221 has 4 divisors (see below), whose sum is σ = 105767298252. Its totient is φ = 90657684192.

The previous prime is 98212491211. The next prime is 98212491229. The reversal of 98212491221 is 12219421289.

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 7980742225 + 90231748996 = 89335^2 + 300386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98212491221 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 (98212491229) 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, 3777403496 + ... + 3777403521.

It is an arithmetic number, because the mean of its divisors is an integer number (26441824563).

Almost surely, 2^98212491221 is an apocalyptic number.

It is an amenable number.

98212491221 is a deficient number, since it is larger than the sum of its proper divisors (7554807031).

98212491221 is a wasteful number, since it uses less digits than its factorization.

98212491221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554807030.

The product of its digits is 41472, while the sum is 41.

The spelling of 98212491221 in words is "ninety-eight billion, two hundred twelve million, four hundred ninety-one thousand, two hundred twenty-one".