1211213002220 has 96 divisors (see below), whose sum is σ = 2900835032256. Its totient is φ = 420837580800.

The previous prime is 1211213002211. The next prime is 1211213002247. The reversal of 1211213002220 is 222003121121.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 29863355 + ... + 29903885.

It is an arithmetic number, because the mean of its divisors is an integer number (30217031586).

Almost surely, 2^{1211213002220} is an apocalyptic number.

1211213002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211213002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450417516128).

1211213002220 is an abundant number, since it is smaller than the sum of its proper divisors (1689622030036).

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

1211213002220 is a wasteful number, since it uses less digits than its factorization.

1211213002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47331 (or 47329 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1211213002220 its reverse (222003121121), we get a palindrome (1433216123341).

The spelling of 1211213002220 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, two thousand, two hundred twenty".