33021143421 has 16 divisors (see below), whose sum is σ = 50329350144. Its totient is φ = 18864943344.

The previous prime is 33021143411. The next prime is 33021143431. The reversal of 33021143421 is 12434112033.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (33021143411) and next prime (33021143431).

It is not a de Polignac number, because 33021143421 - 2¹³ = 33021135229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33021143391 and 33021143400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021143411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82441 + ... + 269886.

It is an arithmetic number, because the mean of its divisors is an integer number (3145584384).

Almost surely, 2^33021143421 is an apocalyptic number.

It is an amenable number.

33021143421 is a deficient number, since it is larger than the sum of its proper divisors (17308206723).

33021143421 is a wasteful number, since it uses less digits than its factorization.

33021143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356800.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 33021143421 its reverse (12434112033), we get a palindrome (45455255454).

The spelling of 33021143421 in words is "thirty-three billion, twenty-one million, one hundred forty-three thousand, four hundred twenty-one".