80702940121 has 4 divisors (see below), whose sum is σ = 80748357172. Its totient is φ = 80657523072.

The previous prime is 80702940103. The next prime is 80702940127. The reversal of 80702940121 is 12104920708.

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 37370689225 + 43332250896 = 193315^2 + 208164^2 .

It is a cyclic number.

It is not a de Polignac number, because 80702940121 - 2⁵ = 80702940089 is a prime.

It is a super-2 number, since 2×80702940121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80702940127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22705860 + ... + 22709413.

It is an arithmetic number, because the mean of its divisors is an integer number (20187089293).

Almost surely, 2^80702940121 is an apocalyptic number.

It is an amenable number.

80702940121 is a deficient number, since it is larger than the sum of its proper divisors (45417051).

80702940121 is a wasteful number, since it uses less digits than its factorization.

80702940121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45417050.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 80702940121 in words is "eighty billion, seven hundred two million, nine hundred forty thousand, one hundred twenty-one".