30000021311 has 6 divisors (see below), whose sum is σ = 32485230360. Its totient is φ = 27692327208.

The previous prime is 30000021307. The next prime is 30000021347. The reversal of 30000021311 is 11312000003.

It is not a de Polignac number, because 30000021311 - 2² = 30000021307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30000021292 and 30000021301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000021391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88757291 + ... + 88757628.

It is an arithmetic number, because the mean of its divisors is an integer number (5414205060).

Almost surely, 2^30000021311 is an apocalyptic number.

30000021311 is a deficient number, since it is larger than the sum of its proper divisors (2485209049).

30000021311 is a wasteful number, since it uses less digits than its factorization.

30000021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177514945 (or 177514932 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 30000021311 its reverse (11312000003), we get a palindrome (41312021314).

The spelling of 30000021311 in words is "thirty billion, twenty-one thousand, three hundred eleven".