1031221332212 has 12 divisors (see below), whose sum is σ = 1813190116416. Its totient is φ = 513167013240.

The previous prime is 1031221332199. The next prime is 1031221332217. The reversal of 1031221332212 is 2122331221301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031221332217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610912268 + ... + 610913955.

It is an arithmetic number, because the mean of its divisors is an integer number (151099176368).

Almost surely, 2^{1031221332212} is an apocalyptic number.

It is an amenable number.

1031221332212 is a deficient number, since it is larger than the sum of its proper divisors (781968784204).

1031221332212 is a wasteful number, since it uses less digits than its factorization.

1031221332212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221826438 (or 1221826436 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1031221332212 its reverse (2122331221301), we get a palindrome (3153552553513).

The spelling of 1031221332212 in words is "one trillion, thirty-one billion, two hundred twenty-one million, three hundred thirty-two thousand, two hundred twelve".