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12001111311 = 37281640213
BaseRepresentation
bin10110010110101001…
…00110110100001111
31010222101012121210010
423023110212310033
5144034241030221
65302505244303
7603253522500
oct131324466417
933871177703
1012001111311
1150a9350612
1223ab193693
1311934635c7
1481bc2aba7
154a38dec76
hex2cb526d0f

12001111311 has 12 divisors (see below), whose sum is σ = 18613968792. Its totient is φ = 6857777808.

The previous prime is 12001111307. The next prime is 12001111321. The reversal of 12001111311 is 11311110021.

It is not a de Polignac number, because 12001111311 - 22 = 12001111307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001111321) 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, 40819960 + ... + 40820253.

It is an arithmetic number, because the mean of its divisors is an integer number (1551164066).

Almost surely, 212001111311 is an apocalyptic number.

12001111311 is a deficient number, since it is larger than the sum of its proper divisors (6612857481).

12001111311 is an equidigital number, since it uses as much as digits as its factorization.

12001111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81640230 (or 81640223 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 12001111311 its reverse (11311110021), we get a palindrome (23312221332).

The spelling of 12001111311 in words is "twelve billion, one million, one hundred eleven thousand, three hundred eleven".

Divisors: 1 3 7 21 49 147 81640213 244920639 571481491 1714444473 4000370437 12001111311