20101222102212 has 36 divisors (see below), whose sum is σ = 51314505936876. Its totient is φ = 6634066699200.

The previous prime is 20101222102187. The next prime is 20101222102223. The reversal of 20101222102212 is 21220122210102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19567670743296 + 533551358916 = 4423536^2 + 730446^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2764190823 + ... + 2764198094.

It is an arithmetic number, because the mean of its divisors is an integer number (1425402942691).

Almost surely, 2^{20101222102212} is an apocalyptic number.

It is an amenable number.

20101222102212 is an abundant number, since it is smaller than the sum of its proper divisors (31213283834664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101222102212 is a wasteful number, since it uses less digits than its factorization.

20101222102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528389028 (or 5528389023 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20101222102212 its reverse (21220122210102), we get a palindrome (41321344312314).

The spelling of 20101222102212 in words is "twenty trillion, one hundred one billion, two hundred twenty-two million, one hundred two thousand, two hundred twelve".