71211012 has 96 divisors (see below), whose sum is σ = 182891520. Its totient is φ = 21490560.

The previous prime is 71210987. The next prime is 71211029. The reversal of 71211012 is 21011217.

It is a super-3 number, since 3×71211012³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71210982 and 71211000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 857923 + ... + 858005.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^71211012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71211012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91445760).

71211012 is an abundant number, since it is smaller than the sum of its proper divisors (111680508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71211012 is a wasteful number, since it uses less digits than its factorization.

71211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 71211012 is about 8438.6617422433. The cubic root of 71211012 is about 414.4915862353.

Adding to 71211012 its reverse (21011217), we get a palindrome (92222229).

The spelling of 71211012 in words is "seventy-one million, two hundred eleven thousand, twelve".