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30102121231 = 713607544963
BaseRepresentation
bin11100000010001110…
…011110101100001111
32212200212110012100221
4130002032132230033
5443122120334411
621455000532211
72113646544250
oct340216365417
985625405327
1030102121231
1111847954246
125a01181067
132ab959c270
141657c2cb27
15bb2a9c071
hex70239eb0f

30102121231 has 16 divisors (see below), whose sum is σ = 37109868544. Its totient is φ = 23777781984.

The previous prime is 30102121229. The next prime is 30102121237. The reversal of 30102121231 is 13212120103.

Adding to 30102121231 its reverse (13212120103), we get a palindrome (43314241334).

It is a cyclic number.

It is not a de Polignac number, because 30102121231 - 21 = 30102121229 is a prime.

It is a super-2 number, since 2×301021212312 (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 (30102121237) 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, 217245 + ... + 327718.

It is an arithmetic number, because the mean of its divisors is an integer number (2319366784).

Almost surely, 230102121231 is an apocalyptic number.

30102121231 is a deficient number, since it is larger than the sum of its proper divisors (7007747313).

30102121231 is a wasteful number, since it uses less digits than its factorization.

30102121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545590.

The product of its (nonzero) digits is 72, while the sum is 16.

The spelling of 30102121231 in words is "thirty billion, one hundred two million, one hundred twenty-one thousand, two hundred thirty-one".

Divisors: 1 7 13 91 607 4249 7891 55237 544963 3814741 7084519 49591633 330792541 2315547787 4300303033 30102121231