21202002111212 has 24 divisors (see below), whose sum is σ = 39958357084800. Its totient is φ = 9785358769536.

The previous prime is 21202002111211. The next prime is 21202002111217. The reversal of 21202002111212 is 21211120020212.

It is a super-2 number, since 2×21202002111212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202002111211) 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, 899537 + ... + 6573672.

It is an arithmetic number, because the mean of its divisors is an integer number (1664931545200).

Almost surely, 2^{21202002111212} is an apocalyptic number.

It is an amenable number.

21202002111212 is a deficient number, since it is larger than the sum of its proper divisors (18756354973588).

21202002111212 is a wasteful number, since it uses less digits than its factorization.

21202002111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7527785 (or 7527783 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202002111212 its reverse (21211120020212), we get a palindrome (42413122131424).

The spelling of 21202002111212 in words is "twenty-one trillion, two hundred two billion, two million, one hundred eleven thousand, two hundred twelve".