2021211112122 has 48 divisors (see below), whose sum is σ = 4391713703520. Its totient is φ = 671828522976.

The previous prime is 2021211112103. The next prime is 2021211112159. The reversal of 2021211112122 is 2212111121202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2021211112095 and 2021211112104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8893233 + ... + 9117675.

It is an arithmetic number, because the mean of its divisors is an integer number (91494035490).

Almost surely, 2^{2021211112122} is an apocalyptic number.

2021211112122 is an abundant number, since it is smaller than the sum of its proper divisors (2370502591398).

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

2021211112122 is a wasteful number, since it uses less digits than its factorization.

2021211112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225867 (or 225864 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2021211112122 its reverse (2212111121202), we get a palindrome (4233322233324).

The spelling of 2021211112122 in words is "two trillion, twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-two".