212878777101 has 16 divisors (see below), whose sum is σ = 290511876864. Its totient is φ = 138595647744.

The previous prime is 212878777093. The next prime is 212878777117. The reversal of 212878777101 is 101777878212.

It is not a de Polignac number, because 212878777101 - 2³ = 212878777093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212878777301) 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, 1587400 + ... + 1716273.

It is an arithmetic number, because the mean of its divisors is an integer number (18156992304).

Almost surely, 2^212878777101 is an apocalyptic number.

It is an amenable number.

212878777101 is a deficient number, since it is larger than the sum of its proper divisors (77633099763).

212878777101 is a wasteful number, since it uses less digits than its factorization.

212878777101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304180.

The product of its (nonzero) digits is 614656, while the sum is 51.

The spelling of 212878777101 in words is "two hundred twelve billion, eight hundred seventy-eight million, seven hundred seventy-seven thousand, one hundred one".