402111212 has 24 divisors (see below), whose sum is σ = 754714800. Its totient is φ = 186878016.

The previous prime is 402111209. The next prime is 402111221. The reversal of 402111212 is 212111204.

It is a happy number.

It is a super-2 number, since 2×402111212² = 323386853632217888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45887 + ... + 53942.

It is an arithmetic number, because the mean of its divisors is an integer number (31446450).

Almost surely, 2^402111212 is an apocalyptic number.

It is an amenable number.

402111212 is a deficient number, since it is larger than the sum of its proper divisors (352603588).

402111212 is a wasteful number, since it uses less digits than its factorization.

402111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99905 (or 99903 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 402111212 is about 20052.7108391858. The cubic root of 402111212 is about 738.1003210150.

Adding to 402111212 its reverse (212111204), we get a palindrome (614222416).

The spelling of 402111212 in words is "four hundred two million, one hundred eleven thousand, two hundred twelve".