2021011501 has 2 divisors, whose sum is σ = 2021011502. Its totient is φ = 2021011500.

The previous prime is 2021011471. The next prime is 2021011507. The reversal of 2021011501 is 1051101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1368260100 + 652751401 = 36990^2 + 25549^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021011501 - 2⁵ = 2021011469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021011507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010505750 + 1010505751.

It is an arithmetic number, because the mean of its divisors is an integer number (1010505751).

Almost surely, 2^2021011501 is an apocalyptic number.

It is an amenable number.

2021011501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021011501 is an equidigital number, since it uses as much as digits as its factorization.

2021011501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 2021011501 is about 44955.6615010835. The cubic root of 2021011501 is about 1264.3178272384.

Adding to 2021011501 its reverse (1051101202), we get a palindrome (3072112703).

The spelling of 2021011501 in words is "two billion, twenty-one million, eleven thousand, five hundred one".