30201231021 has 24 divisors (see below), whose sum is σ = 44218339776. Its totient is φ = 18323585280.

The previous prime is 30201231013. The next prime is 30201231037. The reversal of 30201231021 is 12013210203.

It is not a de Polignac number, because 30201231021 - 2³ = 30201231013 is a prime.

It is a super-2 number, since 2×30201231021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30201231061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 383500 + ... + 455493.

It is an arithmetic number, because the mean of its divisors is an integer number (1842430824).

Almost surely, 2^30201231021 is an apocalyptic number.

It is an amenable number.

30201231021 is a deficient number, since it is larger than the sum of its proper divisors (14017108755).

30201231021 is a wasteful number, since it uses less digits than its factorization.

30201231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839093 (or 839080 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30201231021 its reverse (12013210203), we get a palindrome (42214441224).

The spelling of 30201231021 in words is "thirty billion, two hundred one million, two hundred thirty-one thousand, twenty-one".