1001220121212 has 24 divisors (see below), whose sum is σ = 2399320291536. Its totient is φ = 324720039168.

The previous prime is 1001220121201. The next prime is 1001220121261. The reversal of 1001220121212 is 2121210221001.

It is a super-2 number, since 2×1001220121212² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001220121191 and 1001220121200.

It is a congruent number.

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, 1127499693 + ... + 1127500580.

It is an arithmetic number, because the mean of its divisors is an integer number (99971678814).

Almost surely, 2^{1001220121212} is an apocalyptic number.

1001220121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001220121212 is an abundant number, since it is smaller than the sum of its proper divisors (1398100170324).

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

1001220121212 is a wasteful number, since it uses less digits than its factorization.

1001220121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255000317 (or 2255000315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1001220121212 its reverse (2121210221001), we get a palindrome (3122430342213).

The spelling of 1001220121212 in words is "one trillion, one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".