21021212303033 has 2 divisors, whose sum is σ = 21021212303034. Its totient is φ = 21021212303032.

The previous prime is 21021212303029. The next prime is 21021212303041. The reversal of 21021212303033 is 33030321212012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20341110252544 + 680102050489 = 4510112^2 + 824683^2 .

It is a cyclic number.

It is not a de Polignac number, because 21021212303033 - 2² = 21021212303029 is a prime.

It is not a weakly prime, because it can be changed into another prime (21021212302033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510606151516 + 10510606151517.

It is an arithmetic number, because the mean of its divisors is an integer number (10510606151517).

Almost surely, 2^{21021212303033} is an apocalyptic number.

It is an amenable number.

21021212303033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021212303033 is an equidigital number, since it uses as much as digits as its factorization.

21021212303033 is an evil number, because the sum of its binary digits is even.

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

Adding to 21021212303033 its reverse (33030321212012), we get a palindrome (54051533515045).

The spelling of 21021212303033 in words is "twenty-one trillion, twenty-one billion, two hundred twelve million, three hundred three thousand, thirty-three".