2121022111020 has 48 divisors (see below), whose sum is σ = 5952088850400. Its totient is φ = 564346187776.

The previous prime is 2121022110979. The next prime is 2121022111031. The reversal of 2121022111020 is 201112201212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39338727 + ... + 39392606.

It is an arithmetic number, because the mean of its divisors is an integer number (124001851050).

Almost surely, 2^{2121022111020} is an apocalyptic number.

2121022111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121022111020 is an abundant number, since it is smaller than the sum of its proper divisors (3831066739380).

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

2121022111020 is a wasteful number, since it uses less digits than its factorization.

2121022111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78731794 (or 78731792 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121022111020 its reverse (201112201212), we get a palindrome (2322134312232).

The spelling of 2121022111020 in words is "two trillion, one hundred twenty-one billion, twenty-two million, one hundred eleven thousand, twenty".