2101121111020 has 24 divisors (see below), whose sum is σ = 4412800396368. Its totient is φ = 840363480000.

The previous prime is 2101121110901. The next prime is 2101121111021. The reversal of 2101121111020 is 201111211012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2101121111021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107306 + ... + 5503345.

It is an arithmetic number, because the mean of its divisors is an integer number (183866683182).

Almost surely, 2^{2101121111020} is an apocalyptic number.

2101121111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101121111020 is an abundant number, since it is smaller than the sum of its proper divisors (2311679285348).

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

2101121111020 is a wasteful number, since it uses less digits than its factorization.

2101121111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10620561 (or 10620559 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2101121111020 its reverse (201111211012), we get a palindrome (2302232322032).

The spelling of 2101121111020 in words is "two trillion, one hundred one billion, one hundred twenty-one million, one hundred eleven thousand, twenty".