30121011 has 16 divisors (see below), whose sum is σ = 45061120. Its totient is φ = 19883880.

The previous prime is 30121001. The next prime is 30121043. The reversal of 30121011 is 11012103.

It is not a de Polignac number, because 30121011 - 2¹⁸ = 29858867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30120984 and 30121002.

It is not an unprimeable number, because it can be changed into a prime (30121001) 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, 2635 + ... + 8196.

It is an arithmetic number, because the mean of its divisors is an integer number (2816320).

Almost surely, 2^30121011 is an apocalyptic number.

30121011 is a deficient number, since it is larger than the sum of its proper divisors (14940109).

30121011 is a wasteful number, since it uses less digits than its factorization.

30121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10943 (or 10937 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 30121011 is about 5488.2612000523. The cubic root of 30121011 is about 311.1404782322.

Adding to 30121011 its reverse (11012103), we get a palindrome (41133114).

It can be divided in two parts, 301 and 21011, that added together give a palindrome (21312).

The spelling of 30121011 in words is "thirty million, one hundred twenty-one thousand, eleven".