21210001210112 has 144 divisors (see below), whose sum is σ = 49752849898752. Its totient is φ = 8896778588160.

The previous prime is 21210001210061. The next prime is 21210001210169. The reversal of 21210001210112 is 21101210001212.

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, 131964743 + ... + 132125369.

Almost surely, 2^{21210001210112} is an apocalyptic number.

21210001210112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210001210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24876424949376).

21210001210112 is an abundant number, since it is smaller than the sum of its proper divisors (28542848688640).

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

21210001210112 is a wasteful number, since it uses less digits than its factorization.

21210001210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164274 (or 164260 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21210001210112 its reverse (21101210001212), we get a palindrome (42311211211324).

The spelling of 21210001210112 in words is "twenty-one trillion, two hundred ten billion, one million, two hundred ten thousand, one hundred twelve".