2121012101020 has 24 divisors (see below), whose sum is σ = 4455262123200. Its totient is φ = 848188324032.

The previous prime is 2121012100981. The next prime is 2121012101059. The reversal of 2121012101020 is 201012101212.

It is an interprime number because it is at equal distance from previous prime (2121012100981) and next prime (2121012101059).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13451935 + ... + 13608694.

It is an arithmetic number, because the mean of its divisors is an integer number (185635921800).

Almost surely, 2^{2121012101020} is an apocalyptic number.

2121012101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121012101020 is an abundant number, since it is smaller than the sum of its proper divisors (2334250022180).

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

2121012101020 is a wasteful number, since it uses less digits than its factorization.

2121012101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27064557 (or 27064555 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2121012101020 its reverse (201012101212), we get a palindrome (2322024202232).

The spelling of 2121012101020 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred one thousand, twenty".