20011121212 has 12 divisors (see below), whose sum is σ = 35340742360. Its totient is φ = 9913766256.

The previous prime is 20011121203. The next prime is 20011121237. The reversal of 20011121212 is 21212111002.

It is a super-2 number, since 2×20011121212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011121192 and 20011121201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22948098 + ... + 22948969.

Almost surely, 2^20011121212 is an apocalyptic number.

It is an amenable number.

20011121212 is a deficient number, since it is larger than the sum of its proper divisors (15329621148).

20011121212 is a wasteful number, since it uses less digits than its factorization.

20011121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45897180 (or 45897178 counting only the distinct ones).

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

Adding to 20011121212 its reverse (21212111002), we get a palindrome (41223232214).

The spelling of 20011121212 in words is "twenty billion, eleven million, one hundred twenty-one thousand, two hundred twelve".