102022080077681 has 4 divisors (see below), whose sum is σ = 104779433593332. Its totient is φ = 99264726562032.

The previous prime is 102022080077657. The next prime is 102022080077713. The reversal of 102022080077681 is 186770080220201.

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 68250465595456 + 33771614482225 = 8261384^2 + 5811335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102022080077681 is a prime.

It is a super-2 number, since 2×102022080077681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102022080017681) 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, 1378676757770 + ... + 1378676757843.

It is an arithmetic number, because the mean of its divisors is an integer number (26194858398333).

Almost surely, 2^{102022080077681} is an apocalyptic number.

It is an amenable number.

102022080077681 is a deficient number, since it is larger than the sum of its proper divisors (2757353515651).

102022080077681 is an equidigital number, since it uses as much as digits as its factorization.

102022080077681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757353515650.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 102022080077681 in words is "one hundred two trillion, twenty-two billion, eighty million, seventy-seven thousand, six hundred eighty-one".