2021424101 has 4 divisors (see below), whose sum is σ = 2021576172. Its totient is φ = 2021272032.

The previous prime is 2021424089. The next prime is 2021424121. The reversal of 2021424101 is 1014241202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 496131076 + 1525293025 = 22274^2 + 39055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021424101 is a prime.

It is a super-2 number, since 2×2021424101² = 8172310792207316402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021424101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021424121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53960 + ... + 83393.

It is an arithmetic number, because the mean of its divisors is an integer number (505394043).

Almost surely, 2^2021424101 is an apocalyptic number.

It is an amenable number.

2021424101 is a deficient number, since it is larger than the sum of its proper divisors (152071).

2021424101 is a wasteful number, since it uses less digits than its factorization.

2021424101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152070.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2021424101 is about 44960.2502328446. The cubic root of 2021424101 is about 1264.4038604020.

Adding to 2021424101 its reverse (1014241202), we get a palindrome (3035665303).

The spelling of 2021424101 in words is "two billion, twenty-one million, four hundred twenty-four thousand, one hundred one".