85212011 has 4 divisors (see below), whose sum is σ = 85232400. Its totient is φ = 85191624.

The previous prime is 85211993. The next prime is 85212013. The reversal of 85212011 is 11021258.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11021258 = 2 ⋅5510629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85212011 is a prime.

It is a super-2 number, since 2×85212011² = 14522173637328242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85212013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391 + ... + 13128.

It is an arithmetic number, because the mean of its divisors is an integer number (21308100).

Almost surely, 2^85212011 is an apocalyptic number.

85212011 is a deficient number, since it is larger than the sum of its proper divisors (20389).

85212011 is a wasteful number, since it uses less digits than its factorization.

85212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20388.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 85212011 is about 9231.0352073860. The cubic root of 85212011 is about 440.0482230205.

Adding to 85212011 its reverse (11021258), we get a palindrome (96233269).

The spelling of 85212011 in words is "eighty-five million, two hundred twelve thousand, eleven".