1021121112 has 64 divisors (see below), whose sum is σ = 2818488960. Its totient is φ = 305696000.

The previous prime is 1021121063. The next prime is 1021121147. The reversal of 1021121112 is 2111211201.

1021121112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389 + ... + 45212.

It is an arithmetic number, because the mean of its divisors is an integer number (44038890).

Almost surely, 2^1021121112 is an apocalyptic number.

1021121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021121112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1409244480).

1021121112 is an abundant number, since it is smaller than the sum of its proper divisors (1797367848).

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

1021121112 is a wasteful number, since it uses less digits than its factorization.

1021121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46704 (or 46700 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1021121112 is about 31954.9857142825. The cubic root of 1021121112 is about 1006.9913773974.

Adding to 1021121112 its reverse (2111211201), we get a palindrome (3132332313).

The spelling of 1021121112 in words is "one billion, twenty-one million, one hundred twenty-one thousand, one hundred twelve".