2021222112102 has 16 divisors (see below), whose sum is σ = 4491604693680. Its totient is φ = 673740704016.

The previous prime is 2021222112101. The next prime is 2021222112113. The reversal of 2021222112102 is 2012112221202.

It is a happy number.

2021222112102 is a `hidden beast` number, since 20 + 212 + 221 + 1 + 210 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021222112101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18715019503 + ... + 18715019610.

It is an arithmetic number, because the mean of its divisors is an integer number (280725293355).

Almost surely, 2^{2021222112102} is an apocalyptic number.

2021222112102 is an abundant number, since it is smaller than the sum of its proper divisors (2470382581578).

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

2021222112102 is a wasteful number, since it uses less digits than its factorization.

2021222112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37430039124 (or 37430039118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2021222112102 its reverse (2012112221202), we get a palindrome (4033334333304).

The spelling of 2021222112102 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred two".