10210121221020 has 384 divisors, whose sum is σ = 33343326922752. Its totient is φ = 2286423244800.

The previous prime is 10210121220991. The next prime is 10210121221043. The reversal of 10210121221020 is 2012212101201.

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

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 1698569815 + ... + 1698575825.

It is an arithmetic number, because the mean of its divisors is an integer number (86831580528).

Almost surely, 2^{10210121221020} is an apocalyptic number.

10210121221020 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 10210121221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16671663461376).

10210121221020 is an abundant number, since it is smaller than the sum of its proper divisors (23133205701732).

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

10210121221020 is a wasteful number, since it uses less digits than its factorization.

10210121221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541 (or 6539 counting only the distinct ones).

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

Adding to 10210121221020 its reverse (2012212101201), we get a palindrome (12222333322221).

The spelling of 10210121221020 in words is "ten trillion, two hundred ten billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".