20011020212 has 24 divisors (see below), whose sum is σ = 37129921416. Its totient is φ = 9404080128.

The previous prime is 20011020199. The next prime is 20011020221. The reversal of 20011020212 is 21202011002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17486359696 + 2524660516 = 132236^2 + 50246^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20011020193 and 20011020202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150893 + ... + 250580.

It is an arithmetic number, because the mean of its divisors is an integer number (1547080059).

Almost surely, 2^20011020212 is an apocalyptic number.

It is an amenable number.

20011020212 is a deficient number, since it is larger than the sum of its proper divisors (17118901204).

20011020212 is a wasteful number, since it uses less digits than its factorization.

20011020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402227 (or 402225 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20011020212 its reverse (21202011002), we get a palindrome (41213031214).

The spelling of 20011020212 in words is "twenty billion, eleven million, twenty thousand, two hundred twelve".