20120220212 has 12 divisors (see below), whose sum is σ = 35227255140. Its totient is φ = 10055290176.

The previous prime is 20120220203. The next prime is 20120220217. The reversal of 20120220212 is 21202202102.

It can be written as a sum of positive squares in 2 ways, for example, as 15496764196 + 4623456016 = 124486^2 + 67996^2 .

It is a super-2 number, since 2×20120220212² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120220217) 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, 1195583 + ... + 1212294.

It is an arithmetic number, because the mean of its divisors is an integer number (2935604595).

Almost surely, 2^20120220212 is an apocalyptic number.

It is an amenable number.

20120220212 is a deficient number, since it is larger than the sum of its proper divisors (15107034928).

20120220212 is a wasteful number, since it uses less digits than its factorization.

20120220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409970 (or 2409968 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20120220212 its reverse (21202202102), we get a palindrome (41322422314).

The spelling of 20120220212 in words is "twenty billion, one hundred twenty million, two hundred twenty thousand, two hundred twelve".