99801521061 has 8 divisors (see below), whose sum is σ = 145165848864. Its totient is φ = 60485770320.

The previous prime is 99801521033. The next prime is 99801521089. The reversal of 99801521061 is 16012510899.

It is an interprime number because it is at equal distance from previous prime (99801521033) and next prime (99801521089).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99801521061 - 2⁶ = 99801520997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99801521021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512144226 + ... + 1512144291.

It is an arithmetic number, because the mean of its divisors is an integer number (18145731108).

Almost surely, 2^99801521061 is an apocalyptic number.

It is an amenable number.

99801521061 is a deficient number, since it is larger than the sum of its proper divisors (45364327803).

99801521061 is a wasteful number, since it uses less digits than its factorization.

99801521061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024288531.

The product of its (nonzero) digits is 38880, while the sum is 42.

The spelling of 99801521061 in words is "ninety-nine billion, eight hundred one million, five hundred twenty-one thousand, sixty-one".