102121112 has 8 divisors (see below), whose sum is σ = 191477100. Its totient is φ = 51060552.

The previous prime is 102121109. The next prime is 102121133. The reversal of 102121112 is 211121201.

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

It is a super-2 number, since 2×102121112² = 20857443032233088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102121093 and 102121102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6382562 + ... + 6382577.

Almost surely, 2^102121112 is an apocalyptic number.

It is an amenable number.

102121112 is a deficient number, since it is larger than the sum of its proper divisors (89355988).

102121112 is a wasteful number, since it uses less digits than its factorization.

102121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12765145 (or 12765141 counting only the distinct ones).

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

The square root of 102121112 is about 10105.4990970263. The cubic root of 102121112 is about 467.4177261873.

Adding to 102121112 its reverse (211121201), we get a palindrome (313242313).

The spelling of 102121112 in words is "one hundred two million, one hundred twenty-one thousand, one hundred twelve".