2021023106 has 4 divisors (see below), whose sum is σ = 3031534662. Its totient is φ = 1010511552.

The previous prime is 2021023099. The next prime is 2021023153. The reversal of 2021023106 is 6013201202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6013201202 = 2 ⋅3006600601.

It can be written as a sum of positive squares in only one way, i.e., 1551650881 + 469372225 = 39391^2 + 21665^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505255775 + ... + 505255778.

Almost surely, 2^2021023106 is an apocalyptic number.

2021023106 is a deficient number, since it is larger than the sum of its proper divisors (1010511556).

2021023106 is a wasteful number, since it uses less digits than its factorization.

2021023106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010511555.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2021023106 is about 44955.7905725169. The cubic root of 2021023106 is about 1264.3202472114.

Adding to 2021023106 its reverse (6013201202), we get a palindrome (8034224308).

The spelling of 2021023106 in words is "two billion, twenty-one million, twenty-three thousand, one hundred six".