1001211211212 has 24 divisors (see below), whose sum is σ = 2385865015296. Its totient is φ = 326636281488.

The previous prime is 1001211211201. The next prime is 1001211211223. The reversal of 1001211211212 is 2121121121001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1001211211201) and next prime (1001211211223).

It is a junction number, because it is equal to n+sod(n) for n = 1001211211191 and 1001211211200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887598028 + ... + 887599155.

It is an arithmetic number, because the mean of its divisors is an integer number (99411042304).

Almost surely, 2^{1001211211212} is an apocalyptic number.

1001211211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001211211212 is an abundant number, since it is smaller than the sum of its proper divisors (1384653804084).

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

1001211211212 is a wasteful number, since it uses less digits than its factorization.

1001211211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775197237 (or 1775197235 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1001211211212 its reverse (2121121121001), we get a palindrome (3122332332213).

The spelling of 1001211211212 in words is "one trillion, one billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".