1321012212 has 48 divisors (see below), whose sum is σ = 3323752320. Its totient is φ = 405940608.

The previous prime is 1321012211. The next prime is 1321012237. The reversal of 1321012212 is 2122101231.

It is a junction number, because it is equal to n+sod(n) for n = 1321012191 and 1321012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321012211) 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, 125838 + ... + 135930.

It is an arithmetic number, because the mean of its divisors is an integer number (69244840).

Almost surely, 2^1321012212 is an apocalyptic number.

1321012212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321012212 is an abundant number, since it is smaller than the sum of its proper divisors (2002740108).

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

1321012212 is a wasteful number, since it uses less digits than its factorization.

1321012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952 (or 10950 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1321012212 is about 36345.7316888792. The cubic root of 1321012212 is about 1097.2416321293.

Adding to 1321012212 its reverse (2122101231), we get a palindrome (3443113443).

The spelling of 1321012212 in words is "one billion, three hundred twenty-one million, twelve thousand, two hundred twelve".