1020111212 has 6 divisors (see below), whose sum is σ = 1785194628. Its totient is φ = 510055604.

The previous prime is 1020111187. The next prime is 1020111263. The reversal of 1020111212 is 2121110201.

It is a junction number, because it is equal to n+sod(n) for n = 1020111193 and 1020111202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127513898 + ... + 127513905.

It is an arithmetic number, because the mean of its divisors is an integer number (297532438).

Almost surely, 2^1020111212 is an apocalyptic number.

It is an amenable number.

1020111212 is a deficient number, since it is larger than the sum of its proper divisors (765083416).

1020111212 is a wasteful number, since it uses less digits than its factorization.

1020111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255027807 (or 255027805 counting only the distinct ones).

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

The square root of 1020111212 is about 31939.1798892833. The cubic root of 1020111212 is about 1006.6592927158.

Adding to 1020111212 its reverse (2121110201), we get a palindrome (3141221413).

The spelling of 1020111212 in words is "one billion, twenty million, one hundred eleven thousand, two hundred twelve".