203211220212 has 864 divisors, whose sum is σ = 749557186560. Its totient is φ = 45037555200.

The previous prime is 203211220129. The next prime is 203211220231. The reversal of 203211220212 is 212022112302.

203211220212 is a `hidden beast` number, since 20 + 3 + 211 + 220 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 282629989 + ... + 282630707.

It is an arithmetic number, because the mean of its divisors is an integer number (867543040).

Almost surely, 2^203211220212 is an apocalyptic number.

203211220212 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 203211220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374778593280).

203211220212 is an abundant number, since it is smaller than the sum of its proper divisors (546345966348).

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

203211220212 is a wasteful number, since it uses less digits than its factorization.

203211220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 203211220212 its reverse (212022112302), we get a palindrome (415233332514).

The spelling of 203211220212 in words is "two hundred three billion, two hundred eleven million, two hundred twenty thousand, two hundred twelve".