10211201221020 has 48 divisors (see below), whose sum is σ = 28598124915360. Its totient is φ = 2722343040256.

The previous prime is 10211201221019. The next prime is 10211201221027. The reversal of 10211201221020 is 2012210211201.

It is a super-3 number, since 3×10211201221020³ (a number of 40 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211201221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19867647 + ... + 20375126.

It is an arithmetic number, because the mean of its divisors is an integer number (595794269070).

Almost surely, 2^{10211201221020} is an apocalyptic number.

10211201221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211201221020 is an abundant number, since it is smaller than the sum of its proper divisors (18386923694340).

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

10211201221020 is a wasteful number, since it uses less digits than its factorization.

10211201221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40247014 (or 40247012 counting only the distinct ones).

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

Adding to 10211201221020 its reverse (2012210211201), we get a palindrome (12223411432221).

The spelling of 10211201221020 in words is "ten trillion, two hundred eleven billion, two hundred one million, two hundred twenty-one thousand, twenty".