21212002111008 has 48 divisors (see below), whose sum is σ = 55682931669120. Its totient is φ = 7070486274816.

The previous prime is 21212002111007. The next prime is 21212002111051. The reversal of 21212002111008 is 80011120021212.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (21212002111007) 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, 964473 + ... + 6584391.

It is an arithmetic number, because the mean of its divisors is an integer number (1160061076440).

Almost surely, 2^{21212002111008} is an apocalyptic number.

It is an amenable number.

21212002111008 is an abundant number, since it is smaller than the sum of its proper divisors (34470929558112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21212002111008 is a wasteful number, since it uses less digits than its factorization.

21212002111008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659249 (or 5659241 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The spelling of 21212002111008 in words is "twenty-one trillion, two hundred twelve billion, two million, one hundred eleven thousand, eight".