133212013021 has 4 divisors (see below), whose sum is σ = 133217798652. Its totient is φ = 133206227392.

The previous prime is 133212013009. The next prime is 133212013037. The reversal of 133212013021 is 120310212331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120310212331 = 23 ⋅5230878797.

It can be written as a sum of positive squares in 2 ways, for example, as 27531105625 + 105680907396 = 165925^2 + 325086^2 .

It is a cyclic number.

It is not a de Polignac number, because 133212013021 - 2¹³ = 133212004829 is a prime.

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 133212013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133212013061) 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, 2858140 + ... + 2904373.

It is an arithmetic number, because the mean of its divisors is an integer number (33304449663).

Almost surely, 2^133212013021 is an apocalyptic number.

It is an amenable number.

133212013021 is a deficient number, since it is larger than the sum of its proper divisors (5785631).

133212013021 is an equidigital number, since it uses as much as digits as its factorization.

133212013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785630.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 133212013021 its reverse (120310212331), we get a palindrome (253522225352).

The spelling of 133212013021 in words is "one hundred thirty-three billion, two hundred twelve million, thirteen thousand, twenty-one".