1031201221212 has 72 divisors (see below), whose sum is σ = 2700788986896. Its totient is φ = 331483912704.

The previous prime is 1031201221199. The next prime is 1031201221247. The reversal of 1031201221212 is 2121221021301.

1031201221212 is a `hidden beast` number, since 1 + 0 + 31 + 201 + 221 + 212 = 666.

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 23 ways as a sum of consecutive naturals, for example, 3275038 + ... + 3576069.

Almost surely, 2^{1031201221212} is an apocalyptic number.

1031201221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1031201221212 is an abundant number, since it is smaller than the sum of its proper divisors (1669587765684).

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

1031201221212 is a wasteful number, since it uses less digits than its factorization.

1031201221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851267 (or 6851262 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1031201221212 its reverse (2121221021301), we get a palindrome (3152422242513).

The spelling of 1031201221212 in words is "one trillion, thirty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred twelve".