11211211302220 has 48 divisors (see below), whose sum is σ = 24355991399040. Its totient is φ = 4329740221184.

The previous prime is 11211211302211. The next prime is 11211211302229. The reversal of 11211211302220 is 2220311211211.

It is an interprime number because it is at equal distance from previous prime (11211211302211) and next prime (11211211302229).

It is not an unprimeable number, because it can be changed into a prime (11211211302229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25702182 + ... + 26134738.

It is an arithmetic number, because the mean of its divisors is an integer number (507416487480).

Almost surely, 2^{11211211302220} is an apocalyptic number.

11211211302220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211211302220 is an abundant number, since it is smaller than the sum of its proper divisors (13144780096820).

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

11211211302220 is a wasteful number, since it uses less digits than its factorization.

11211211302220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477282 (or 477280 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11211211302220 its reverse (2220311211211), we get a palindrome (13431522513431).

The spelling of 11211211302220 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, three hundred two thousand, two hundred twenty".