20102121112 has 16 divisors (see below), whose sum is σ = 38402637840. Its totient is φ = 9861417696.

The previous prime is 20102121097. The next prime is 20102121113. The reversal of 20102121112 is 21112120102.

It is a super-2 number, since 2×20102121112² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102121092 and 20102121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102121113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23704908 + ... + 23705755.

It is an arithmetic number, because the mean of its divisors is an integer number (2400164865).

Almost surely, 2^20102121112 is an apocalyptic number.

It is an amenable number.

20102121112 is a deficient number, since it is larger than the sum of its proper divisors (18300516728).

20102121112 is a wasteful number, since it uses less digits than its factorization.

20102121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47410722 (or 47410718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20102121112 its reverse (21112120102), we get a palindrome (41214241214).

The spelling of 20102121112 in words is "twenty billion, one hundred two million, one hundred twenty-one thousand, one hundred twelve".