2021120220100 has 36 divisors (see below), whose sum is σ = 4385952326224. Its totient is φ = 808425701280.

The previous prime is 2021120220089. The next prime is 2021120220101. The reversal of 2021120220100 is 10220211202.

It is a happy number.

It is a super-3 number, since 3×2021120220100³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021120220101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3619867 + ... + 4140733.

Almost surely, 2^{2021120220100} is an apocalyptic number.

2021120220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021120220100 is an abundant number, since it is smaller than the sum of its proper divisors (2364832106124).

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

2021120220100 is a wasteful number, since it uses less digits than its factorization.

2021120220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559684 (or 559677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021120220100 its reverse (10220211202), we get a palindrome (2031340431302).

The spelling of 2021120220100 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred twenty thousand, one hundred".