30145011021 has 12 divisors (see below), whose sum is σ = 44032039740. Its totient is φ = 19870868160.

The previous prime is 30145010993. The next prime is 30145011077. The reversal of 30145011021 is 12011054103.

It can be written as a sum of positive squares in 2 ways, for example, as 18245255625 + 11899755396 = 135075^2 + 109086^2 .

It is not a de Polignac number, because 30145011021 - 2⁷ = 30145010893 is a prime.

It is a super-2 number, since 2×30145011021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30145010985 and 30145011003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30145011521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18816310 + ... + 18817911.

It is an arithmetic number, because the mean of its divisors is an integer number (3669336645).

Almost surely, 2^30145011021 is an apocalyptic number.

It is an amenable number.

30145011021 is a deficient number, since it is larger than the sum of its proper divisors (13887028719).

30145011021 is a wasteful number, since it uses less digits than its factorization.

30145011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37634316 (or 37634313 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 30145011021 its reverse (12011054103), we get a palindrome (42156065124).

The spelling of 30145011021 in words is "thirty billion, one hundred forty-five million, eleven thousand, twenty-one".