21022101101212 has 48 divisors (see below), whose sum is σ = 39457316626560. Its totient is φ = 9769524118848.

The previous prime is 21022101101207. The next prime is 21022101101227. The reversal of 21022101101212 is 21210110122012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103026963 + ... + 103230805.

It is an arithmetic number, because the mean of its divisors is an integer number (822027429720).

Almost surely, 2^{21022101101212} is an apocalyptic number.

It is an amenable number.

21022101101212 is a deficient number, since it is larger than the sum of its proper divisors (18435215525348).

21022101101212 is a wasteful number, since it uses less digits than its factorization.

21022101101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229522 (or 229520 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21022101101212 its reverse (21210110122012), we get a palindrome (42232211223224).

The spelling of 21022101101212 in words is "twenty-one trillion, twenty-two billion, one hundred one million, one hundred one thousand, two hundred twelve".