2021012101 has 2 divisors, whose sum is σ = 2021012102. Its totient is φ = 2021012100.

The previous prime is 2021012033. The next prime is 2021012107. The reversal of 2021012101 is 1012101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1896689601 + 124322500 = 43551^2 + 11150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021012101 - 2⁷ = 2021011973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021012107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010506050 + 1010506051.

It is an arithmetic number, because the mean of its divisors is an integer number (1010506051).

Almost surely, 2^2021012101 is an apocalyptic number.

It is an amenable number.

2021012101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021012101 is an equidigital number, since it uses as much as digits as its factorization.

2021012101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2021012101 is about 44955.6681743248. The cubic root of 2021012101 is about 1264.3179523557.

Adding to 2021012101 its reverse (1012101202), we get a palindrome (3033113303).

It can be divided in two parts, 202 and 1012101, that multiplied together give a palindrome (204444402).

The spelling of 2021012101 in words is "two billion, twenty-one million, twelve thousand, one hundred one".