211202201220 has 48 divisors (see below), whose sum is σ = 600192535488. Its totient is φ = 55479980160.

The previous prime is 211202201201. The next prime is 211202201239. The reversal of 211202201220 is 22102202112.

211202201220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211202201201) and next prime (211202201239).

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

It is a self number, because there is not a number n which added to its sum of digits gives 211202201220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26264911 + ... + 26272950.

It is an arithmetic number, because the mean of its divisors is an integer number (12504011156).

Almost surely, 2^211202201220 is an apocalyptic number.

211202201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202201220 is an abundant number, since it is smaller than the sum of its proper divisors (388990334268).

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

211202201220 is a wasteful number, since it uses less digits than its factorization.

211202201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52537940 (or 52537938 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 211202201220 its reverse (22102202112), we get a palindrome (233304403332).

The spelling of 211202201220 in words is "two hundred eleven billion, two hundred two million, two hundred one thousand, two hundred twenty".