21212002021101 has 8 divisors (see below), whose sum is σ = 28546993374624. Its totient is φ = 14009172674160.

The previous prime is 21212002021087. The next prime is 21212002021121. The reversal of 21212002021101 is 10112020021212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21212002021101 - 2¹¹ = 21212002019053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212002021121) 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, 33040501270 + ... + 33040501911.

It is an arithmetic number, because the mean of its divisors is an integer number (3568374171828).

Almost surely, 2^{21212002021101} is an apocalyptic number.

It is an amenable number.

21212002021101 is a deficient number, since it is larger than the sum of its proper divisors (7334991353523).

21212002021101 is a wasteful number, since it uses less digits than its factorization.

21212002021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66081003291.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21212002021101 its reverse (10112020021212), we get a palindrome (31324022042313).

The spelling of 21212002021101 in words is "twenty-one trillion, two hundred twelve billion, two million, twenty-one thousand, one hundred one".