212299655450866 has 16 divisors (see below), whose sum is σ = 334110933174528. Its totient is φ = 101041612851600.

The previous prime is 212299655450819. The next prime is 212299655450903. The reversal of 212299655450866 is 668054556992212.

It is a super-2 number, since 2×212299655450866² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212299655450795 and 212299655450804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28067110900 + ... + 28067118463.

It is an arithmetic number, because the mean of its divisors is an integer number (20881933323408).

Almost surely, 2^{212299655450866} is an apocalyptic number.

212299655450866 is a deficient number, since it is larger than the sum of its proper divisors (121811277723662).

212299655450866 is a wasteful number, since it uses less digits than its factorization.

212299655450866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56134229457.

The product of its (nonzero) digits is 559872000, while the sum is 70.

The spelling of 212299655450866 in words is "two hundred twelve trillion, two hundred ninety-nine billion, six hundred fifty-five million, four hundred fifty thousand, eight hundred sixty-six".