1020011221212 has 12 divisors (see below), whose sum is σ = 2380026182856. Its totient is φ = 340003740400.

The previous prime is 1020011221193. The next prime is 1020011221217. The reversal of 1020011221212 is 2121221100201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020011221191 and 1020011221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020011221217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42500467539 + ... + 42500467562.

It is an arithmetic number, because the mean of its divisors is an integer number (198335515238).

Almost surely, 2^{1020011221212} is an apocalyptic number.

1020011221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020011221212 is an abundant number, since it is smaller than the sum of its proper divisors (1360014961644).

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

1020011221212 is a wasteful number, since it uses less digits than its factorization.

1020011221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85000935108 (or 85000935106 counting only the distinct ones).

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

Adding to 1020011221212 its reverse (2121221100201), we get a palindrome (3141232321413).

The spelling of 1020011221212 in words is "one trillion, twenty billion, eleven million, two hundred twenty-one thousand, two hundred twelve".