2211201221020 has 96 divisors (see below), whose sum is σ = 5364129355200. Its totient is φ = 756705853440.

The previous prime is 2211201221017. The next prime is 2211201221051. The reversal of 2211201221020 is 201221021122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2211201220985 and 2211201221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57490756 + ... + 57529204.

It is an arithmetic number, because the mean of its divisors is an integer number (55876347450).

Almost surely, 2^{2211201221020} is an apocalyptic number.

2211201221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211201221020 is an abundant number, since it is smaller than the sum of its proper divisors (3152928134180).

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

2211201221020 is a wasteful number, since it uses less digits than its factorization.

2211201221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53863 (or 53861 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2211201221020 its reverse (201221021122), we get a palindrome (2412422242142).

The spelling of 2211201221020 in words is "two trillion, two hundred eleven billion, two hundred one million, two hundred twenty-one thousand, twenty".