30311132213021 has 12 divisors (see below), whose sum is σ = 33317921079996. Its totient is φ = 27554974149120.

The previous prime is 30311132212939. The next prime is 30311132213041. The reversal of 30311132213021 is 12031223111303.

It can be written as a sum of positive squares in 2 ways, for example, as 8596594680025 + 21714537532996 = 2931995^2 + 4659886^2 .

It is not a de Polignac number, because 30311132213021 - 2¹⁴ = 30311132196637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311132213041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2892215 + ... + 8305851.

It is an arithmetic number, because the mean of its divisors is an integer number (2776493423333).

Almost surely, 2^{30311132213021} is an apocalyptic number.

It is an amenable number.

30311132213021 is a deficient number, since it is larger than the sum of its proper divisors (3006788866975).

30311132213021 is a wasteful number, since it uses less digits than its factorization.

30311132213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459932 (or 5459921 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 30311132213021 its reverse (12031223111303), we get a palindrome (42342355324324).

The spelling of 30311132213021 in words is "thirty trillion, three hundred eleven billion, one hundred thirty-two million, two hundred thirteen thousand, twenty-one".