1021100001212 has 6 divisors (see below), whose sum is σ = 1786925002128. Its totient is φ = 510550000604.

The previous prime is 1021100001211. The next prime is 1021100001277. The reversal of 1021100001212 is 2121000011201.

It is a junction number, because it is equal to n+sod(n) for n = 1021100001193 and 1021100001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100001211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127637500148 + ... + 127637500155.

It is an arithmetic number, because the mean of its divisors is an integer number (297820833688).

Almost surely, 2^{1021100001212} is an apocalyptic number.

It is an amenable number.

1021100001212 is a deficient number, since it is larger than the sum of its proper divisors (765825000916).

1021100001212 is a wasteful number, since it uses less digits than its factorization.

1021100001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255275000307 (or 255275000305 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021100001212 its reverse (2121000011201), we get a palindrome (3142100012413).

The spelling of 1021100001212 in words is "one trillion, twenty-one billion, one hundred million, one thousand, two hundred twelve".