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30121213321 = 56353501267
BaseRepresentation
bin11100000011010111…
…010011110110001001
32212202012101011210101
4130003113103312021
5443142012311241
621500522045401
72114301042313
oct340327236611
985665334711
1030121213321
1111857704431
125a07649861
132ac0525364
14165a59c7b3
15bb45bde31
hex7035d3d89

30121213321 has 4 divisors (see below), whose sum is σ = 30174715152. Its totient is φ = 30067711492.

The previous prime is 30121213267. The next prime is 30121213337. The reversal of 30121213321 is 12331212103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30121213321 - 29 = 30121212809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121213351) 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, 26750071 + ... + 26751196.

It is an arithmetic number, because the mean of its divisors is an integer number (7543678788).

Almost surely, 230121213321 is an apocalyptic number.

It is an amenable number.

30121213321 is a deficient number, since it is larger than the sum of its proper divisors (53501831).

30121213321 is an equidigital number, since it uses as much as digits as its factorization.

30121213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53501830.

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

Adding to 30121213321 its reverse (12331212103), we get a palindrome (42452425424).

The spelling of 30121213321 in words is "thirty billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred twenty-one".

Divisors: 1 563 53501267 30121213321