212101101240 has 64 divisors (see below), whose sum is σ = 727203778560. Its totient is φ = 48480251520.

The previous prime is 212101101209. The next prime is 212101101241. The reversal of 212101101240 is 42101101212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101101241) 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, 126249816 + ... + 126251495.

It is an arithmetic number, because the mean of its divisors is an integer number (11362559040).

Almost surely, 2^212101101240 is an apocalyptic number.

212101101240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101101240 is an abundant number, since it is smaller than the sum of its proper divisors (515102677320).

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

212101101240 is a wasteful number, since it uses less digits than its factorization.

212101101240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252501332 (or 252501328 counting only the distinct ones).

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

Adding to 212101101240 its reverse (42101101212), we get a palindrome (254202202452).

The spelling of 212101101240 in words is "two hundred twelve billion, one hundred one million, one hundred one thousand, two hundred forty".