2021110210157 has 2 divisors, whose sum is σ = 2021110210158. Its totient is φ = 2021110210156.

The previous prime is 2021110210117. The next prime is 2021110210193. The reversal of 2021110210157 is 7510120111202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1533562733641 + 487547476516 = 1238371^2 + 698246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021110210157 - 2¹² = 2021110206061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021110210117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555105078 + 1010555105079.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555105079).

Almost surely, 2^{2021110210157} is an apocalyptic number.

It is an amenable number.

2021110210157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021110210157 is an equidigital number, since it uses as much as digits as its factorization.

2021110210157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 2021110210157 its reverse (7510120111202), we get a palindrome (9531230321359).

The spelling of 2021110210157 in words is "two trillion, twenty-one billion, one hundred ten million, two hundred ten thousand, one hundred fifty-seven".