21021023133302 has 4 divisors (see below), whose sum is σ = 31531534699956. Its totient is φ = 10510511566650.

The previous prime is 21021023133281. The next prime is 21021023133307. The reversal of 21021023133302 is 20333132012012.

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

It is a super-2 number, since 2×21021023133302² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021023133307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255255783324 + ... + 5255255783327.

It is an arithmetic number, because the mean of its divisors is an integer number (7882883674989).

Almost surely, 2^{21021023133302} is an apocalyptic number.

21021023133302 is a deficient number, since it is larger than the sum of its proper divisors (10510511566654).

21021023133302 is a wasteful number, since it uses less digits than its factorization.

21021023133302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510511566653.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21021023133302 its reverse (20333132012012), we get a palindrome (41354155145314).

The spelling of 21021023133302 in words is "twenty-one trillion, twenty-one billion, twenty-three million, one hundred thirty-three thousand, three hundred two".