20101220220212 has 12 divisors (see below), whose sum is σ = 37246378643460. Its totient is φ = 9459397750656.

The previous prime is 20101220220209. The next prime is 20101220220223. The reversal of 20101220220212 is 21202202210102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6482492813476 + 13618727406736 = 2546074^2 + 3690356^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 147803089787 + ... + 147803089922.

It is an arithmetic number, because the mean of its divisors is an integer number (3103864886955).

Almost surely, 2^{20101220220212} is an apocalyptic number.

It is an amenable number.

20101220220212 is a deficient number, since it is larger than the sum of its proper divisors (17145158423248).

20101220220212 is a wasteful number, since it uses less digits than its factorization.

20101220220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295606179730 (or 295606179728 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20101220220212 its reverse (21202202210102), we get a palindrome (41303422430314).

The spelling of 20101220220212 in words is "twenty trillion, one hundred one billion, two hundred twenty million, two hundred twenty thousand, two hundred twelve".