11211201012220 has 72 divisors (see below), whose sum is σ = 26134639401024. Its totient is φ = 4036435920000.

The previous prime is 11211201012217. The next prime is 11211201012251. The reversal of 11211201012220 is 2221010211211.

It is a junction number, because it is equal to n+sod(n) for n = 11211201012194 and 11211201012203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22689876 + ... + 23178715.

It is an arithmetic number, because the mean of its divisors is an integer number (362981102792).

Almost surely, 2^{11211201012220} is an apocalyptic number.

11211201012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211201012220 is an abundant number, since it is smaller than the sum of its proper divisors (14923438388804).

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

11211201012220 is a wasteful number, since it uses less digits than its factorization.

11211201012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45868723 (or 45868710 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11211201012220 its reverse (2221010211211), we get a palindrome (13432211223431).

The spelling of 11211201012220 in words is "eleven trillion, two hundred eleven billion, two hundred one million, twelve thousand, two hundred twenty".