99677300021 has 12 divisors (see below), whose sum is σ = 108722460132. Its totient is φ = 91338189696.

The previous prime is 99677299993. The next prime is 99677300027. The reversal of 99677300021 is 12000377699.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 25017748900 + 74659551121 = 158170^2 + 273239^2 .

It is a de Polignac number, because none of the positive numbers 2^k-99677300021 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99677300027) 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, 2129426 + ... + 2175731.

It is an arithmetic number, because the mean of its divisors is an integer number (9060205011).

Almost surely, 2^99677300021 is an apocalyptic number.

It is an amenable number.

99677300021 is a deficient number, since it is larger than the sum of its proper divisors (9045160111).

99677300021 is a wasteful number, since it uses less digits than its factorization.

99677300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305320 (or 4305307 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 44.

The spelling of 99677300021 in words is "ninety-nine billion, six hundred seventy-seven million, three hundred thousand, twenty-one".