21111010210212 has 48 divisors (see below), whose sum is σ = 53069040971520. Its totient is φ = 6493140983808.

The previous prime is 21111010210183. The next prime is 21111010210259. The reversal of 21111010210212 is 21201201011112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21111010210191 and 21111010210200.

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, 26211037 + ... + 27004452.

It is an arithmetic number, because the mean of its divisors is an integer number (1105605020240).

Almost surely, 2^{21111010210212} is an apocalyptic number.

It is an amenable number.

21111010210212 is an abundant number, since it is smaller than the sum of its proper divisors (31958030761308).

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

21111010210212 is a wasteful number, since it uses less digits than its factorization.

21111010210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53218052 (or 53218050 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21111010210212 its reverse (21201201011112), we get a palindrome (42312211221324).

The spelling of 21111010210212 in words is "twenty-one trillion, one hundred eleven billion, ten million, two hundred ten thousand, two hundred twelve".