401210221212 has 36 divisors (see below), whose sum is σ = 1020629979096. Its totient is φ = 132884912160.

The previous prime is 401210221207. The next prime is 401210221229. The reversal of 401210221212 is 212122012104.

401210221212 is a `hidden beast` number, since 401 + 21 + 0 + 221 + 21 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35487114 + ... + 35498417.

Almost surely, 2^401210221212 is an apocalyptic number.

It is an amenable number.

401210221212 is an abundant number, since it is smaller than the sum of its proper divisors (619419757884).

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

401210221212 is a wasteful number, since it uses less digits than its factorization.

401210221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70985698 (or 70985693 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 401210221212 its reverse (212122012104), we get a palindrome (613332233316).

The spelling of 401210221212 in words is "four hundred one billion, two hundred ten million, two hundred twenty-one thousand, two hundred twelve".