2021121002122 has 4 divisors (see below), whose sum is σ = 3031681503186. Its totient is φ = 1010560501060.

The previous prime is 2021121002081. The next prime is 2021121002221. The reversal of 2021121002122 is 2212001211202.

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., 1913294801961 + 107826200161 = 1383219^2 + 328369^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021121002096 and 2021121002105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505280250529 + ... + 505280250532.

Almost surely, 2^{2021121002122} is an apocalyptic number.

2021121002122 is a deficient number, since it is larger than the sum of its proper divisors (1010560501064).

2021121002122 is a wasteful number, since it uses less digits than its factorization.

2021121002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010560501063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021121002122 its reverse (2212001211202), we get a palindrome (4233122213324).

The spelling of 2021121002122 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two thousand, one hundred twenty-two".