212140211240 has 16 divisors (see below), whose sum is σ = 477315475380. Its totient is φ = 84856084480.

The previous prime is 212140211237. The next prime is 212140211273. The reversal of 212140211240 is 42112041212.

It can be written as a sum of positive squares in 2 ways, for example, as 200505137284 + 11635073956 = 447778^2 + 107866^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651752601 + ... + 2651752680.

Almost surely, 2^212140211240 is an apocalyptic number.

212140211240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212140211240 is an abundant number, since it is smaller than the sum of its proper divisors (265175264140).

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

212140211240 is a wasteful number, since it uses less digits than its factorization.

212140211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303505292 (or 5303505288 counting only the distinct ones).

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

Adding to 212140211240 its reverse (42112041212), we get a palindrome (254252252452).

The spelling of 212140211240 in words is "two hundred twelve billion, one hundred forty million, two hundred eleven thousand, two hundred forty".