1021111001212 has 6 divisors (see below), whose sum is σ = 1786944252128. Its totient is φ = 510555500604.

The previous prime is 1021111001203. The next prime is 1021111001219. The reversal of 1021111001212 is 2121001111201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021111001192 and 1021111001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021111001219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127638875148 + ... + 127638875155.

Almost surely, 2^{1021111001212} is an apocalyptic number.

It is an amenable number.

1021111001212 is a deficient number, since it is larger than the sum of its proper divisors (765833250916).

1021111001212 is a wasteful number, since it uses less digits than its factorization.

1021111001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255277750307 (or 255277750305 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021111001212 its reverse (2121001111201), we get a palindrome (3142112112413).

The spelling of 1021111001212 in words is "one trillion, twenty-one billion, one hundred eleven million, one thousand, two hundred twelve".