21202021002212 has 6 divisors (see below), whose sum is σ = 37103536753878. Its totient is φ = 10601010501104.

The previous prime is 21202021002203. The next prime is 21202021002247. The reversal of 21202021002212 is 21220012020212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21066851538496 + 135169463716 = 4589864^2 + 367654^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2650252625273 + ... + 2650252625280.

It is an arithmetic number, because the mean of its divisors is an integer number (6183922792313).

Almost surely, 2^{21202021002212} is an apocalyptic number.

It is an amenable number.

21202021002212 is a deficient number, since it is larger than the sum of its proper divisors (15901515751666).

21202021002212 is a wasteful number, since it uses less digits than its factorization.

21202021002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300505250557 (or 5300505250555 counting only the distinct ones).

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

Adding to 21202021002212 its reverse (21220012020212), we get a palindrome (42422033022424).

The spelling of 21202021002212 in words is "twenty-one trillion, two hundred two billion, twenty-one million, two thousand, two hundred twelve".