2101022121220 has 96 divisors (see below), whose sum is σ = 4863788197632. Its totient is φ = 755995200000.

The previous prime is 2101022121199. The next prime is 2101022121251. The reversal of 2101022121220 is 221212201012.

It is a happy number.

It is a super-4 number, since 4×2101022121220⁴ (a number of 50 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2101022121194 and 2101022121203.

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, 38657865 + ... + 38712175.

It is an arithmetic number, because the mean of its divisors is an integer number (50664460392).

Almost surely, 2^{2101022121220} is an apocalyptic number.

2101022121220 is a gapful number since it is divisible by the number (20) 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 2101022121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2431894098816).

2101022121220 is an abundant number, since it is smaller than the sum of its proper divisors (2762766076412).

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

2101022121220 is a wasteful number, since it uses less digits than its factorization.

2101022121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56173 (or 56171 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2101022121220 its reverse (221212201012), we get a palindrome (2322234322232).

The spelling of 2101022121220 in words is "two trillion, one hundred one billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty".