1020121112 has 8 divisors (see below), whose sum is σ = 1912727100. Its totient is φ = 510060552.

The previous prime is 1020121111. The next prime is 1020121133. The reversal of 1020121112 is 2111210201.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1020121093 and 1020121102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63757562 + ... + 63757577.

Almost surely, 2^1020121112 is an apocalyptic number.

It is an amenable number.

1020121112 is a deficient number, since it is larger than the sum of its proper divisors (892605988).

1020121112 is a wasteful number, since it uses less digits than its factorization.

1020121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127515145 (or 127515141 counting only the distinct ones).

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

The square root of 1020121112 is about 31939.3348709706. The cubic root of 1020121112 is about 1006.6625491891.

Adding to 1020121112 its reverse (2111210201), we get a palindrome (3131331313).

It can be divided in two parts, 10201 and 21112, that multiplied together give a palindrome (215363512).

The spelling of 1020121112 in words is "one billion, twenty million, one hundred twenty-one thousand, one hundred twelve".