77106160212021 has 6 divisors (see below), whose sum is σ = 111375564750710. Its totient is φ = 51404106808008.

The previous prime is 77106160212017. The next prime is 77106160212047. The reversal of 77106160212021 is 12021206160177.

77106160212021 is a `hidden beast` number, since 7 + 7 + 1 + 0 + 6 + 1 + 602 + 1 + 20 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68591938100625 + 8514222111396 = 8282025^2 + 2917914^2 .

It is not a de Polignac number, because 77106160212021 - 2² = 77106160212017 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 (77106160212421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4283675567326 + ... + 4283675567343.

Almost surely, 2^{77106160212021} is an apocalyptic number.

It is an amenable number.

77106160212021 is a deficient number, since it is larger than the sum of its proper divisors (34269404538689).

77106160212021 is a wasteful number, since it uses less digits than its factorization.

77106160212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8567351134675 (or 8567351134672 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

Adding to 77106160212021 its reverse (12021206160177), we get a palindrome (89127366372198).

The spelling of 77106160212021 in words is "seventy-seven trillion, one hundred six billion, one hundred sixty million, two hundred twelve thousand, twenty-one".