10001220211220 has 96 divisors (see below), whose sum is σ = 24562416899328. Its totient is φ = 3349071194112.

The previous prime is 10001220211183. The next prime is 10001220211231. The reversal of 10001220211220 is 2211202210001.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 10001220211195 and 10001220211204.

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, 172486154 + ... + 172544126.

It is an arithmetic number, because the mean of its divisors is an integer number (255858509368).

Almost surely, 2^{10001220211220} is an apocalyptic number.

10001220211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001220211220 is an abundant number, since it is smaller than the sum of its proper divisors (14561196688108).

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

10001220211220 is a wasteful number, since it uses less digits than its factorization.

10001220211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86689 (or 86687 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10001220211220 its reverse (2211202210001), we get a palindrome (12212422421221).

The spelling of 10001220211220 in words is "ten trillion, one billion, two hundred twenty million, two hundred eleven thousand, two hundred twenty".