78212239490101 has 16 divisors (see below), whose sum is σ = 78860525927040. Its totient is φ = 77566729849600.

The previous prime is 78212239490093. The next prime is 78212239490129. The reversal of 78212239490101 is 10109493221287.

It is a cyclic number.

It is not a de Polignac number, because 78212239490101 - 2³ = 78212239490093 is a prime.

It is a super-2 number, since 2×78212239490101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78212239460101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355369470 + ... + 355589488.

It is an arithmetic number, because the mean of its divisors is an integer number (4928782870440).

Almost surely, 2^{78212239490101} is an apocalyptic number.

It is an amenable number.

78212239490101 is a deficient number, since it is larger than the sum of its proper divisors (648286436939).

78212239490101 is a wasteful number, since it uses less digits than its factorization.

78212239490101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226316.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 78212239490101 in words is "seventy-eight trillion, two hundred twelve billion, two hundred thirty-nine million, four hundred ninety thousand, one hundred one".