2211220121202 has 80 divisors (see below), whose sum is σ = 4989513988800. Its totient is φ = 731907967392.

The previous prime is 2211220121179. The next prime is 2211220121249. The reversal of 2211220121202 is 2021210221122.

It is a happy number.

2211220121202 is a `hidden beast` number, since 221 + 1 + 220 + 1 + 21 + 202 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 94295443 + ... + 94318889.

It is an arithmetic number, because the mean of its divisors is an integer number (62368924860).

Almost surely, 2^{2211220121202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211220121202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2494756994400).

2211220121202 is an abundant number, since it is smaller than the sum of its proper divisors (2778293867598).

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

2211220121202 is a wasteful number, since it uses less digits than its factorization.

2211220121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27517 (or 27508 counting only the distinct ones).

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

Adding to 2211220121202 its reverse (2021210221122), we get a palindrome (4232430342324).

The spelling of 2211220121202 in words is "two trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, two hundred two".