2021121111222 has 48 divisors (see below), whose sum is σ = 4388038265520. Its totient is φ = 672331752000.

The previous prime is 2021121111197. The next prime is 2021121111277. The reversal of 2021121111222 is 2221111211202.

2021121111222 is a `hidden beast` number, since 20 + 211 + 211 + 1 + 1 + 222 = 666.

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 = 2021121111195 and 2021121111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59394529 + ... + 59428547.

It is an arithmetic number, because the mean of its divisors is an integer number (91417463865).

Almost surely, 2^{2021121111222} is an apocalyptic number.

2021121111222 is an abundant number, since it is smaller than the sum of its proper divisors (2366917154298).

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

2021121111222 is a wasteful number, since it uses less digits than its factorization.

2021121111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40669 (or 40666 counting only the distinct ones).

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

Adding to 2021121111222 its reverse (2221111211202), we get a palindrome (4242232322424).

The spelling of 2021121111222 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".