221130301212 has 24 divisors (see below), whose sum is σ = 573300781200. Its totient is φ = 73710100368.

The previous prime is 221130301207. The next prime is 221130301237. The reversal of 221130301212 is 212103031122.

221130301212 is a `hidden beast` number, since 2 + 21 + 130 + 301 + 212 = 666.

It is a super-2 number, since 2×221130301212² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1023751287 + ... + 1023751502.

It is an arithmetic number, because the mean of its divisors is an integer number (23887532550).

Almost surely, 2^221130301212 is an apocalyptic number.

It is an amenable number.

221130301212 is an abundant number, since it is smaller than the sum of its proper divisors (352170479988).

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

221130301212 is a wasteful number, since it uses less digits than its factorization.

221130301212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047502802 (or 2047502794 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221130301212 its reverse (212103031122), we get a palindrome (433233332334).

The spelling of 221130301212 in words is "two hundred twenty-one billion, one hundred thirty million, three hundred one thousand, two hundred twelve".