20011212112 has 10 divisors (see below), whose sum is σ = 38771723498. Its totient is φ = 10005606048.

The previous prime is 20011212083. The next prime is 20011212191. The reversal of 20011212112 is 21121211002.

It can be written as a sum of positive squares in only one way, i.e., 17288042256 + 2723169856 = 131484^2 + 52184^2 .

It is a super-2 number, since 2×20011212112² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011212092 and 20011212101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625350363 + ... + 625350394.

Almost surely, 2^20011212112 is an apocalyptic number.

It is an amenable number.

20011212112 is a deficient number, since it is larger than the sum of its proper divisors (18760511386).

20011212112 is a wasteful number, since it uses less digits than its factorization.

20011212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250700765 (or 1250700759 counting only the distinct ones).

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

Adding to 20011212112 its reverse (21121211002), we get a palindrome (41132423114).

The spelling of 20011212112 in words is "twenty billion, eleven million, two hundred twelve thousand, one hundred twelve".