2021001222122 has 4 divisors (see below), whose sum is σ = 3031501833186. Its totient is φ = 1010500611060.

The previous prime is 2021001222089. The next prime is 2021001222131. The reversal of 2021001222122 is 2212221001202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1265195286481 + 755805935641 = 1124809^2 + 869371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021001222122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505250305529 + ... + 505250305532.

Almost surely, 2^{2021001222122} is an apocalyptic number.

2021001222122 is a deficient number, since it is larger than the sum of its proper divisors (1010500611064).

2021001222122 is a wasteful number, since it uses less digits than its factorization.

2021001222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010500611063.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2021001222122 its reverse (2212221001202), we get a palindrome (4233222223324).

The spelling of 2021001222122 in words is "two trillion, twenty-one billion, one million, two hundred twenty-two thousand, one hundred twenty-two".