1308211212 has 144 divisors (see below), whose sum is σ = 3893678208. Its totient is φ = 338042880.

The previous prime is 1308211187. The next prime is 1308211213. The reversal of 1308211212 is 2121128031.

It is a super-2 number, since 2×1308211212² = 3422833150405017888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1308211213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1661883 + ... + 1662669.

It is an arithmetic number, because the mean of its divisors is an integer number (27039432).

Almost surely, 2^1308211212 is an apocalyptic number.

1308211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1308211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946839104).

1308211212 is an abundant number, since it is smaller than the sum of its proper divisors (2585466996).

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

1308211212 is a wasteful number, since it uses less digits than its factorization.

1308211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1308211212 is about 36169.2025347532. The cubic root of 1308211212 is about 1093.6859230728.

Adding to 1308211212 its reverse (2121128031), we get a palindrome (3429339243).

The spelling of 1308211212 in words is "one billion, three hundred eight million, two hundred eleven thousand, two hundred twelve".