2101121002020 has 96 divisors (see below), whose sum is σ = 6308056742400. Its totient is φ = 520664961024.

The previous prime is 2101121001997. The next prime is 2101121002039. The reversal of 2101121002020 is 202001211012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2101121001987 and 2101121002005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12956905 + ... + 13118064.

It is an arithmetic number, because the mean of its divisors is an integer number (65708924400).

Almost surely, 2^{2101121002020} is an apocalyptic number.

2101121002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101121002020 is an abundant number, since it is smaller than the sum of its proper divisors (4206935740380).

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

2101121002020 is a wasteful number, since it uses less digits than its factorization.

2101121002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26075077 (or 26075075 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2101121002020 its reverse (202001211012), we get a palindrome (2303122213032).

The spelling of 2101121002020 in words is "two trillion, one hundred one billion, one hundred twenty-one million, two thousand, twenty".