212885269891 has 32 divisors (see below), whose sum is σ = 263923752960. Its totient is φ = 167621913216.

The previous prime is 212885269879. The next prime is 212885269931. The reversal of 212885269891 is 198962588212.

212885269891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212885269891 - 2⁷ = 212885269763 is a prime.

It is a super-2 number, since 2×212885269891² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212885269871) 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 31 ways as a sum of consecutive naturals, for example, 1368030 + ... + 1515676.

It is an arithmetic number, because the mean of its divisors is an integer number (8247617280).

Almost surely, 2^212885269891 is an apocalyptic number.

212885269891 is a deficient number, since it is larger than the sum of its proper divisors (51038483069).

212885269891 is a wasteful number, since it uses less digits than its factorization.

212885269891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148003.

The product of its digits is 9953280, while the sum is 61.

The spelling of 212885269891 in words is "two hundred twelve billion, eight hundred eighty-five million, two hundred sixty-nine thousand, eight hundred ninety-one".