21212002101202 has 16 divisors (see below), whose sum is σ = 35017721896032. Its totient is φ = 9556493302720.

The previous prime is 21212002101151. The next prime is 21212002101209. The reversal of 21212002101202 is 20210120021212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21212002101209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4266289168 + ... + 4266294139.

It is an arithmetic number, because the mean of its divisors is an integer number (2188607618502).

Almost surely, 2^{21212002101202} is an apocalyptic number.

21212002101202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21212002101202 is a deficient number, since it is larger than the sum of its proper divisors (13805719794830).

21212002101202 is a wasteful number, since it uses less digits than its factorization.

21212002101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532583433.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21212002101202 its reverse (20210120021212), we get a palindrome (41422122122414).

The spelling of 21212002101202 in words is "twenty-one trillion, two hundred twelve billion, two million, one hundred one thousand, two hundred two".