30311230312021 has 16 divisors (see below), whose sum is σ = 31961308196160. Its totient is φ = 28666632412800.

The previous prime is 30311230311961. The next prime is 30311230312043. The reversal of 30311230312021 is 12021303211303.

It is a cyclic number.

It is not a de Polignac number, because 30311230312021 - 2³⁷ = 30173791358549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30311230311983 and 30311230312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311230312061) 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, 263915610 + ... + 264030436.

It is an arithmetic number, because the mean of its divisors is an integer number (1997581762260).

Almost surely, 2^{30311230312021} is an apocalyptic number.

It is an amenable number.

30311230312021 is a deficient number, since it is larger than the sum of its proper divisors (1650077884139).

30311230312021 is a wasteful number, since it uses less digits than its factorization.

30311230312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138564.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 30311230312021 its reverse (12021303211303), we get a palindrome (42332533523324).

The spelling of 30311230312021 in words is "thirty trillion, three hundred eleven billion, two hundred thirty million, three hundred twelve thousand, twenty-one".