212013121236 has 192 divisors, whose sum is σ = 594904020480. Its totient is φ = 57487933440.

The previous prime is 212013121169. The next prime is 212013121237. The reversal of 212013121236 is 632121310212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212013121237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56369596 + ... + 56373356.

It is an arithmetic number, because the mean of its divisors is an integer number (3098458440).

Almost surely, 2^212013121236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212013121236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297452010240).

212013121236 is an abundant number, since it is smaller than the sum of its proper divisors (382890899244).

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

212013121236 is a wasteful number, since it uses less digits than its factorization.

212013121236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194 (or 4192 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 212013121236 its reverse (632121310212), we get a palindrome (844134431448).

The spelling of 212013121236 in words is "two hundred twelve billion, thirteen million, one hundred twenty-one thousand, two hundred thirty-six".