221003234012 has 48 divisors (see below), whose sum is σ = 448851352320. Its totient is φ = 94098681600.

The previous prime is 221003233981. The next prime is 221003234041. The reversal of 221003234012 is 210432300122.

It is a super-2 number, since 2×221003234012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 542312 + ... + 857967.

It is an arithmetic number, because the mean of its divisors is an integer number (9351069840).

Almost surely, 2^221003234012 is an apocalyptic number.

221003234012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221003234012 is an abundant number, since it is smaller than the sum of its proper divisors (227848118308).

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

221003234012 is a wasteful number, since it uses less digits than its factorization.

221003234012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400522 (or 1400520 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221003234012 its reverse (210432300122), we get a palindrome (431435534134).

The spelling of 221003234012 in words is "two hundred twenty-one billion, three million, two hundred thirty-four thousand, twelve".