10221112001220 has 192 divisors, whose sum is σ = 29035377401856. Its totient is φ = 2686310645760.

The previous prime is 10221112001213. The next prime is 10221112001249. The reversal of 10221112001220 is 2210021112201.

It is a super-3 number, since 3×10221112001220³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10221112001220.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1113285030 + ... + 1113294210.

It is an arithmetic number, because the mean of its divisors is an integer number (151225923968).

Almost surely, 2^{10221112001220} is an apocalyptic number.

10221112001220 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 10221112001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14517688700928).

10221112001220 is an abundant number, since it is smaller than the sum of its proper divisors (18814265400636).

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

10221112001220 is a wasteful number, since it uses less digits than its factorization.

10221112001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10270 (or 10268 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10221112001220 its reverse (2210021112201), we get a palindrome (12431133113421).

The spelling of 10221112001220 in words is "ten trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, two hundred twenty".