401311212 has 12 divisors (see below), whose sum is σ = 936392856. Its totient is φ = 133770400.

The previous prime is 401311189. The next prime is 401311219. The reversal of 401311212 is 212113104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×401311212² = 322101377753817888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401311191 and 401311200.

It is not an unprimeable number, because it can be changed into a prime (401311219) 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, 16721289 + ... + 16721312.

It is an arithmetic number, because the mean of its divisors is an integer number (78032738).

Almost surely, 2^401311212 is an apocalyptic number.

It is an amenable number.

401311212 is an abundant number, since it is smaller than the sum of its proper divisors (535081644).

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

401311212 is a wasteful number, since it uses less digits than its factorization.

401311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33442608 (or 33442606 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 401311212 is about 20032.7534802383. The cubic root of 401311212 is about 737.6105126740.

Adding to 401311212 its reverse (212113104), we get a palindrome (613424316).

It can be divided in two parts, 4013 and 11212, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 401311212 in words is "four hundred one million, three hundred eleven thousand, two hundred twelve".