221212321131006 has 32 divisors (see below), whose sum is σ = 503015097150720. Its totient is φ = 72022616181432.

The previous prime is 221212321131001. The next prime is 221212321131023. The reversal of 221212321131006 is 600131123212122.

It is a happy number.

221212321131006 is a `hidden beast` number, since 2 + 2 + 1 + 21 + 2 + 321 + 1 + 310 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212321131001) 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, 47634003090 + ... + 47634007733.

It is an arithmetic number, because the mean of its divisors is an integer number (15719221785960).

Almost surely, 2^{221212321131006} is an apocalyptic number.

221212321131006 is an abundant number, since it is smaller than the sum of its proper divisors (281802776019714).

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

221212321131006 is a wasteful number, since it uses less digits than its factorization.

221212321131006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95268010877 (or 95268010871 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 221212321131006 its reverse (600131123212122), we get a palindrome (821343444343128).

The spelling of 221212321131006 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, one hundred thirty-one thousand, six".