201211220202102 has 96 divisors (see below), whose sum is σ = 477907497639936. Its totient is φ = 60676213449600.

The previous prime is 201211220202071. The next prime is 201211220202149. The reversal of 201211220202102 is 201202022112102.

It is a happy number.

201211220202102 is a `hidden beast` number, since 2 + 0 + 1 + 211 + 220 + 20 + 210 + 2 = 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 47 ways as a sum of consecutive naturals, for example, 113523618 + ... + 115282410.

It is an arithmetic number, because the mean of its divisors is an integer number (4978203100416).

Almost surely, 2^{201211220202102} is an apocalyptic number.

201211220202102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 201211220202102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238953748819968).

201211220202102 is an abundant number, since it is smaller than the sum of its proper divisors (276696277437834).

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

201211220202102 is a wasteful number, since it uses less digits than its factorization.

201211220202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761626 (or 1761623 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201211220202102 its reverse (201202022112102), we get a palindrome (402413242314204).

The spelling of 201211220202102 in words is "two hundred one trillion, two hundred eleven billion, two hundred twenty million, two hundred two thousand, one hundred two".