401215251212 has 24 divisors (see below), whose sum is σ = 708799741104. Its totient is φ = 198707450112.

The previous prime is 401215251181. The next prime is 401215251221. The reversal of 401215251212 is 212152512104.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 550598 + ... + 1051469.

It is an arithmetic number, because the mean of its divisors is an integer number (29533322546).

Almost surely, 2^401215251212 is an apocalyptic number.

It is an amenable number.

401215251212 is a deficient number, since it is larger than the sum of its proper divisors (307584489892).

401215251212 is a wasteful number, since it uses less digits than its factorization.

401215251212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602665 (or 1602663 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 401215251212 its reverse (212152512104), we get a palindrome (613367763316).

The spelling of 401215251212 in words is "four hundred one billion, two hundred fifteen million, two hundred fifty-one thousand, two hundred twelve".