211213165421642 has 16 divisors (see below), whose sum is σ = 318626235273600. Its totient is φ = 105004555680480.

The previous prime is 211213165421641. The next prime is 211213165421711. The reversal of 211213165421642 is 246124561312112.

It is a super-2 number, since 2×211213165421642² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211213165421642.

It is not an unprimeable number, because it can be changed into a prime (211213165421641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30711659 + ... + 36954462.

It is an arithmetic number, because the mean of its divisors is an integer number (19914139704600).

Almost surely, 2^{211213165421642} is an apocalyptic number.

211213165421642 is a deficient number, since it is larger than the sum of its proper divisors (107413069851958).

211213165421642 is a wasteful number, since it uses less digits than its factorization.

211213165421642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67675021.

The product of its digits is 138240, while the sum is 41.

The spelling of 211213165421642 in words is "two hundred eleven trillion, two hundred thirteen billion, one hundred sixty-five million, four hundred twenty-one thousand, six hundred forty-two".