212012102120240 has 80 divisors (see below), whose sum is σ = 522138084943392. Its totient is φ = 79783567675392.

The previous prime is 212012102120239. The next prime is 212012102120249. The reversal of 212012102120240 is 42021201210212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (212012102120249) 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, 28669934 + ... + 35298573.

Almost surely, 2^{212012102120240} is an apocalyptic number.

212012102120240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012102120240 is an abundant number, since it is smaller than the sum of its proper divisors (310125982823152).

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

212012102120240 is a wasteful number, since it uses less digits than its factorization.

212012102120240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63970974 (or 63970968 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212012102120240 its reverse (42021201210212), we get a palindrome (254033303330452).

The spelling of 212012102120240 in words is "two hundred twelve trillion, twelve billion, one hundred two million, one hundred twenty thousand, two hundred forty".