2021402133 has 12 divisors (see below), whose sum is σ = 2920240908. Its totient is φ = 1347399360.

The previous prime is 2021402129. The next prime is 2021402137. The reversal of 2021402133 is 3312041202.

It is an interprime number because it is at equal distance from previous prime (2021402129) and next prime (2021402137).

It can be written as a sum of positive squares in 2 ways, for example, as 551216484 + 1470185649 = 23478^2 + 38343^2 .

It is not a de Polignac number, because 2021402133 - 2² = 2021402129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021402137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70191 + ... + 94707.

It is an arithmetic number, because the mean of its divisors is an integer number (243353409).

Almost surely, 2^2021402133 is an apocalyptic number.

It is an amenable number.

2021402133 is a deficient number, since it is larger than the sum of its proper divisors (898838775).

2021402133 is a wasteful number, since it uses less digits than its factorization.

2021402133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33684 (or 33681 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2021402133 is about 44960.0059274907. The cubic root of 2021402133 is about 1264.3992800463.

Adding to 2021402133 its reverse (3312041202), we get a palindrome (5333443335).

It can be divided in two parts, 20 and 21402133, that added together give a triangular number (21402153 = T₆₅₄₂).

The spelling of 2021402133 in words is "two billion, twenty-one million, four hundred two thousand, one hundred thirty-three".