401011212 has 48 divisors (see below), whose sum is σ = 1073399040. Its totient is φ = 114142272.

The previous prime is 401011157. The next prime is 401011213. The reversal of 401011212 is 212110104.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (401011213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13723 + ... + 31469.

It is an arithmetic number, because the mean of its divisors is an integer number (22362480).

Almost surely, 2^401011212 is an apocalyptic number.

401011212 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

401011212 is an abundant number, since it is smaller than the sum of its proper divisors (672387828).

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

401011212 is a wasteful number, since it uses less digits than its factorization.

401011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18030 (or 18028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 401011212 is about 20025.2643428245. The cubic root of 401011212 is about 737.4266667292.

Adding to 401011212 its reverse (212110104), we get a palindrome (613121316).

The spelling of 401011212 in words is "four hundred one million, eleven thousand, two hundred twelve".