20101212212 has 6 divisors (see below), whose sum is σ = 35177121378. Its totient is φ = 10050606104.

The previous prime is 20101212211. The next prime is 20101212223. The reversal of 20101212212 is 21221210102.

It can be written as a sum of positive squares in only one way, i.e., 19961168656 + 140043556 = 141284^2 + 11834^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101212211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512651523 + ... + 2512651530.

It is an arithmetic number, because the mean of its divisors is an integer number (5862853563).

Almost surely, 2^20101212212 is an apocalyptic number.

It is an amenable number.

20101212212 is a deficient number, since it is larger than the sum of its proper divisors (15075909166).

20101212212 is a wasteful number, since it uses less digits than its factorization.

20101212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025303057 (or 5025303055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20101212212 its reverse (21221210102), we get a palindrome (41322422314).

The spelling of 20101212212 in words is "twenty billion, one hundred one million, two hundred twelve thousand, two hundred twelve".