21002110201212 has 48 divisors (see below), whose sum is σ = 56218576415232. Its totient is φ = 5977786927680.

The previous prime is 21002110201153. The next prime is 21002110201213. The reversal of 21002110201212 is 21210201120012.

It is a junction number, because it is equal to n+sod(n) for n = 21002110201191 and 21002110201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002110201213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475310839 + ... + 475355022.

It is an arithmetic number, because the mean of its divisors is an integer number (1171220341984).

Almost surely, 2^{21002110201212} is an apocalyptic number.

It is an amenable number.

21002110201212 is an abundant number, since it is smaller than the sum of its proper divisors (35216466214020).

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

21002110201212 is a wasteful number, since it uses less digits than its factorization.

21002110201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950666138 (or 950666136 counting only the distinct ones).

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

Adding to 21002110201212 its reverse (21210201120012), we get a palindrome (42212311321224).

The spelling of 21002110201212 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred one thousand, two hundred twelve".